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Hybrid, organic and bio-materials


Hybrid materials engineering in biology, chemistry and physics

Engineering of hybrid materials, i.e. nano-sized units assembled to yield Organic/Inorganic or Bio/Inorganic functional hetero-structures, is now a reality. Far beyond chemistry, the possibilities offered by hybrid systems to combine and control functionalities at the nanoscale find today many applications in various fields of high societal impact concerning biology, physics and electronics, or the medical fields.



The demand for new materials and devices for tailor-made applications has led to a tremendous research activity exploring the possibilities offered by various kinds of functional building blocks to design matter, this on the seam of various scientific communities. In this respect, hybrid materials approaches are now part of the efficient tools employed for materials engineering. The field has expanded far beyond the classical borders of chemistry and has "spilled over" into biology, physics and electronics, or the medical fields. This point is one of the key drivers for further innovation, as combining concepts of many disciplines results in the realization of new systems with peculiar chemical, physical, or biological properties.

Conceiving such systems has obvious usefulness and market potential. Yet, some issues have to be addressed to reinforce the use of hybrid systems and to pass academic frontier toward applications. A critical issue is to better understand and control the interfaces between component to improve functionalities and performances (size-effect, synergy). From top to bottom, flexible processing, self-assembly, self-organization, particles shaping, chemical bonding should be investigated to respond to the ever-growing need in designing new performing materials regarding their use for energy, information storage, sustainable development, health care and theragnostic (bio-sensing, imaging and cargo particles).

Therefore, cross-disciplinary approaches will be specially emphasized, as well as some frames regarding toxicology and legislation concerning hybrid materials. The symposium, intrinsically multi-disciplinary, will be dedicated to forefront research advances and be a very valuable and stimulating forum for researchers in bioscience, chemistry, physics, materials science and engineering where to discuss the latest advances and issues in the design of smart Organic/Inorganic based devices.

The symposium is organized with the support of the COST Action 1202 HINT (Rational Design of Hybrid Interfaces).
More over Symposium Q is involved with the "Japan in Motion" event in collaboration with the Japanese National Institute for Materials Science (NIMS).


Hot topics to be covered by the symposium:

  • Bio-inspired synthesis
  • Green production routes to hybrid materials
  • In situ study of hybrid materials growth, engineering and modeling
  • In operando, in vivo studies
  • Hybrid materials for electronic and spintronic
  • Energy related hybrid materials
  • Hybrid materials for galenic domain and theragnostics
  • Adaptable and complex systems


Invited Speakers:

  • Veronica de Zea Bermudez, University of Trás-os-Montes e Alto Douro, Vila Real, Portugal
  • Bruno Bujoli, University of Nantes, France
  • Eugenio Coronado, University of Valencia, Spain
  • Pietro Gambardella, ETH Zürich, Switzerland
  • SeongJu Hwang, Ewha University, Seoul, Korea
  • Takashi Kato, University of Tokyo, Japan
  • José Kenny, University of Perugia, Italy
  • Guido Kickelbick, Saarland University, Germany
  • Fiona Meldrum, University of Leeds, UK
  • Makoto Ogawa, Waseda University, Tokyo, Japan
  • Uli Wiesner, Cornell University, USA


"Japan in Motion" event speakers of NIMS:

  • Hiroshi Kitagawa (iCeMS) “Functional Materials Based on Elemental Strategy
  • Taro Hitosugi (AIMR) “Thin films and surface formation of novel metal oxides


Call for papers:

The symposium will consist in a set of invited talks together with oral and poster presentations selected among the abstracts submitted through the conference website.
There will be no proceedings but a “Cluster issue” of the European Journal of Inorganic Chemistry (EurJIC) will be produced on the basis of contributions from this symposium, including a set of invited papers. All meeting participants selected to present a communication will be able to contribute to the issue should they wish to do so by submitting one (1) regular paper in the usual way for the journal. The deadline for submission of papers will be end of May, 2014.




Symposium organizers:


Fabrice Leroux
Research Director
ICCF, Blaise Pascal University, UMR CNRS n°6296, Inorganic Materials Laboratory
24, avenue des Landais, BP 80026
63171 Aubière cedex
Phone: +33 (0)4 73407036
Fax: +33 (0)4 73407108

Pierre Rabu
Institute of Physics and chemistry of Materials of Strasbourg (IPCMS)
23, rue du Loess - BP.43
67034 Strasbourg
Phone: +33 (0)3 88 107135
Fax: +33 (0)3 88107247

Nico A.J.M. Sommerdijk
Laboratory of Materials and Interface Chemistry
Department of Chemical Engineering and Chemistry
Eindhoven University of Technology
5600 MB Eindhoven
The Netherlands
Phone: +31 40 247 5870
Fax: +31 40 244 5619

Andreas Taubert
Potsdam University
Institute of Chemistry
Karl-Liebknecht-Str. 24-25
Building 26, Room 2.64
D-14476 Golm
Phone: +49 (0)331 977 5773
Fax: +41 (0)331 977 5055

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Authors : Clément SANCHEZ
Affiliations : Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, CNRS, Université Pierre et Marie Curie. Collège de France, 11 Place Marcelin Berthelot, Bâtiment D. 75231, Paris, France.;

Resume : Hybrid inorganic-organic materials can be broadly defined as synthetic materials with organic and inorganic components which are intimately mixed. The mild synthetic conditions provided by the sol-gel process such as metallo-organic precursors, low processing temperatures and the versatility of the colloidal state allow for the mixing of the organic and inorganic components at the nanometer scale in virtually any ratio. These features, and the advancement of organometallic chemistry and polymer and sol-gel processing, make possible a high degree of control over both composition and structure (including nanostructure) of these materials, which present tunable structure-property relationships. This, in turn, makes it possible to tailor and fine-tune properties (mechanical, optical, electronic, thermal, chemical…) in very broad ranges, and to design specific systems for applications. Advanced functional inorganic or hybrid materials can be processed as thin films, fibers, monoliths or can be designed as materials having complex shapes or hierarchical structures. The seemingly unlimited variety, unique structure-property control, and the compositional and shaping flexibility give these materials a high potential in catalysis, biocatalysis, photocatalysis, nanomedicine, etc…. This lecture will describe some recent advances on the chemistry and processing of nanostructured and hierarchically structured functional inorganic and hybrid solids. Some of their properties will be discuss

Authors : Amelie Heuer-Jungemann (1), Robert Kirkwood (1), Afaf H. El-Sagheer (2), (3) Tom Brown (2), (4) and Antonios G. Kanaras (1), (4)
Affiliations : (1) Physics, Faculty of Physical Sciences and Engineering, University of Southampton, Southampton, UK, SO171BJ (2) Chemistry, Faculty of Natural Sciences and Engineering, university of Southampton, Southampton, UK, SO171BJ (3) Chemistry Branch, Department of Science and Mathematics, Faculty of Petroleum and Mining Engineering, Suez University, Suez 43721, Egypt. (4) Institute for Life Sciences, University of Southampton, Southampton, SO17 1BJ, UK

Resume : The realization of new tools to manipulate the organization of DNA-coated nanoparticles is of major importance and can facilitate advanced applications in several scientific fields such as nanophotonics and metamaterials, nanoelectronics and nanodiagnostics. In this presentation, we will demonstrate that simple chemical methods, such as the copper free click chemistry can be employed as a new tool to utilize the formation of well-defined DNA-nanoparticle structures.[1] These structures can be seen as the next step of evolution in the programmed self- assembly of nanoparticles and they are currently studied by us as advanced systems for biomedical applications and nanophotonics.[2] [1]. Heuer-Jungemann, A.; Kirkwood, R.;El-Sagheer, A.; Brown, T.; Kanaras* A. G. Nanoscale 2013, 5 (16), 7209-7212 [2]. Heuer-Jungemann, A.; Harimech, P.; Brown, T.; Kanaras* A. G. Nanoscale, 2013,5, 9503–9510

Authors : A. Kovalenko1,2, J. Jouhannaud2,E. Lima2, P. Polavarapu1, M.P. Krafft1, G. Waton1, G. Pourroy2
Affiliations : 1 Systemes Organises Fluores à Finalites Therapeutiques (SOFFT) Institut Charles Sadron (ICS) CNRS - Universit? de Strasbourg (UPR 22). 23 rue du Loess, BP 84047. 67034 Strasbourg Cedex 2. France; 2 Institut de Physique et Chimie des Materiaux de Strasbourg IPCMS, UMR 7504 CNRS-ECPM-Universite de Strasbourg, 23 rue du Loess BP 43, 67034 Strasbourg cedex 2 France

Resume : We report on the stabilization of nanoparticle-decorated microbubbles on long periods of time using a synergism between a soluble surfactant and magnetic nanoparticles. The soluble surfactant is the perfluoroalkyl phosphate C8F17(CH2)2OP(O)(OH)2 (labeled F8H2Phos), and the nanoparticles (NPs) are 20-25 nm cobalt ferrite. Incorporation of nanoparticles in the bubble shell can provide multiple imaging modalities for medical diagnostics and as vectors for drug or gene delivery. The NPs-F8H2Phos system has been studied by dynamic light scattering, dynamic magnetic susceptibility measurements and thermal gravimetric analysis. Microbubbles with diameters in the 1-20 ?m range have been stabilized in 0.1M NaCl brine. Its presence is crucial for the long-term stabilization. The surfactant adsorbs rapidly on the bubbles and slows down the bubble shrinkage. Thus, the NPs can attach to the bubble and form a rigid shell. The charge screening by NaCl favors the attachment of NPs to the bubble surface. The presence of CoFe2O4 nanoparticles at the bubble shell is evidenced by thermally-induced inflation-deflation experiments and the control of bubbles with a magnetic field.

Authors : Jean-Michel Rueff1, Bernard Raveau1, Marion Galmiche1, Olivier Perez1, Hélène Couthon-Gourvès2, Mathieu Berchel2, Paul-Alain Jaffrès2
Affiliations : 1 CRISMAT, CNRS UMR 6508, ENSICAEN-Caen. 2 Université de Brest, CNRS, UMR 6521, CEMCA.

Resume : Silver salts, metal or nanoparticles have bactericidal properties due to their abilities to release silver ions that can interact with biomolecules. Our recent work in this field has shown that silver-based hybrid materials were able to release silver ions in aqueous solution thus exhibiting a bactericidal effect against six bacterial strains and, especially, against Gram-negative strains. The dimensionality and the structure of a hybrid material, for a selected metal, are easily controlled via the nature of the organic precursor or the synthesis conditions. We aimed to study the influence of the dimensionality and structure of the final material, on their capacity to release silver ions in aqueous solution. To this end, we have realized the synthesis of hybrid materials with original architectures from: silver salt and a) original rigid polyfunctional ligands possessing at least one phosphonic acid and/or one carboxylic acid bonded to a rigid cycle or b) n-alkylphosphonates. Various experimental conditions for the synthesis of materials were explored such as the influence of the pH or the temperature. Several materials were obtained and their structure solved by X-ray diffraction on single crystals. The synthesis, structure, thermal stability and the quantification of silver release in aqueous solution will be presented. The influence of the rigidity, polarity and the number and type of reactive functions of the organic ligand involved in the synthesis will be also discussed.

SESSION Q.2 : Jose Kenny
Authors : Verónica de Zea Bermudez
Affiliations : Chemistry Department and CQ-VR, University of Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal

Resume : In the last few years bio-inspired strategies have been extensively adopted with the goal of designing innovative materials exhibiting the high sophistication, complexity [1,2], hierarchical structure [2], hybrid synergy, emergent behavior [3], miniaturization, integration and adaptability offered by materials in Nature [4]. Applications of the resulting functional (soft, hard or hybrid) materials in robotics and manufacturing, nanoscience and technology, microelectronics and netted systems, but also in biomedicine, bionanotechnology and nanochemistry are expected [5,6]. Self-assembly is the key driving force in the integration of natural and synthetic materials [6]. Interestingly, many self-assembled organic/inorganic hybrid materials display unmistakable signs of complexity, such as fractality [7], emergent phenomena and hysteresis [8], mimicking those seen in biological systems. [1] N. Goldenfeld, L. P. Kadanoff, Science, 284 (1999) 87. [2] P. W. Anderson, Science 177 (1972) 4047. [3] R. B. Laughlin, D. Pines, Proceedings National Academy of Sciences, 97 (2000) 282. [4] K. Vallé, P. Belleville, F. Pereira, C. Sanchez, Nature Materials, 5 (2006) 107. [5] E. Dujardin, S. Mann, Advanced Materials, 14 (2002) 775. [6] G. M. Whitesides, B. Grzybowski, Science, 295 (2002) 2418. [7] B. Mandelbrot, Science, 156 (1967) 636. [8] J. D. Phillips, Progress in Physical Geography, 27 (2003) 1.

Authors : Abraham Chemtob1, Héloïse De Paz-Simon1, Céline Croutxé-Barghorn1, Séverinne Rigolet2, Laure Michelin2, Loïc Vidal2, Bénédicte Lebeau2
Affiliations : 1 Laboratory of Macromolecular Photochemistry and Engineering, University of Haute-Alsace, ENSCMu, 3 bis rue Alfred Werner, 68093 Mulhouse Cedex, France 2 Institut de Science des Matériaux de Mulhouse, UMR-CNRS 7361, University of Haute-Alsace, 3 rue Alfred Werner 68093, Mulhouse Cedex, France

Resume : In the synthesis of hybrid materials, there is a high interest to find simple, efficient and rapid processing methods. Over the last decade, UV irradiation has made a valuable contribution in this field especially for mesostructured surfactant-silica films. Initially implemented to eliminate the organic template by photodegradation, this technology has proven its utility for patterning, driving sol-gel polymerization and controlling self-assembly. Most photo-mediated processes rely on in situ photogeneration of Brönsted photoacids to promote hydrolysis and condensation of siloxane species. Many advantages result from a light-induced polymerization as regard to efficiency (yields, reactivity), environmental impact (solvent-free, low energy consumption) and improved control (temporal and spatial control). This talk shall provides a state-of-the-art and comprehensive review of domains in which light has enabled technical innovations in the synthesis of mesoporous inorganic and hybrid films. (1) De Paz, H.; Chemtob, A.; Croutxe-Barghorn, C.; Le Nouen, S.; Rigolet, S. J. Phys. Chem. B 2012, 116, 5260. (2) De Paz, H.; Chemtob, A.; Croutxé-Barghorn, C.; Rigolet, S.; Lebeau, B. Microporous Mesoporous Mater. 2012, 151, 88. (3) De Paz-Simon, H.; Chemtob, A.; Crest, F.; Croutxe-Barghorn, C.; Michelin, L.; Vidal, L.; Rigolet, S.; Lebeau, B. RSC Adv. 2012, 2, 11944.

Authors : Christophe Lavenn,1 Nathalie Guillou,2 Gilles Ledoux,3 Christophe Dujardin,3 Aude Demessence*1
Affiliations : 1. Institut de Recherches sur la Catalyse et l’Environnement de Lyon, UMR 5256, CNRS / Université Lyon 1 - Villeurbanne, France. 2. Institut Lavoisier de Versailles, UMR 8180, CNRS / Université de Versailles St-Quentin - Versailles, France. 3. Institut Lumière Matière, UMR5306, CNRS / Université Lyon 1 - Villeurbanne, France.

Resume : Polynuclear hybrid Au(I) compounds exhibit a very large domain of applications such as electronic devices, sensors, photocatalysis and also biology or health. These applications are related to the ability of gold(I) to form aurophilic interactions which gives luminescent materials. Thiolate gold(I) compounds are an important class of materials due to the high affinity of gold for sulfur and can generate complexes, polymers, stabilized gold nanoparticles or SAM. Thus, thiolate gold(I) polymers are a key step in the Brust synthesis of gold nanoparticles. However relatively little is known about their structure and properties and their influence on the size and electronic properties of the particles. Indeed, luminescence of thiolate gold nanoclusters, with gold core diameter less than 2 nm, is highly dependent of the structure and the arrangement of Au(I)-thiolate motifs at the surface. So to understand the luminescence and the formation of gold clusters, we will present the synthesis and the first structure resolutions by powder X-Ray diffraction of series of {Au(I)-SR}n coordination polymers. We will demonstrate that depending on the substituent (R = Ph, PhCOOH, PhNH2, PhtBu, naphthalene, C11H23, C2H4Ph…) different structures are obtained (lamellar or helicoidal) with luminescent properties governed by Au-Au distances. Reduction of these polymers to form functionalized gold nanoparticles will also be reported and will contribute to a better control of nanoparticles preparation.

SESSION Q.3 : Guildo Kickelbick
Authors : Seong-Ju Hwang
Affiliations : Department of Chemistry and Nano Science, Ewha Womans University, Seoul 120-750, Korea

Resume : Over the past decade, my group has carried out systematic study on the exploration of 3D heterostructured hybrid materials with diverse functionalities using the exfoliated 2D nanosheets of layered inorganic solids (layered metal oxides, layered double hydroxides, layered metal chalcogenides, and graphene). Main purpose of our researches is to explore novel functional materials applicable for energy and environmental technologies. The 2D nanosheets of inorganic solids and graphene can be used as efficient precursors for porous heterostructured nanohybrids, multilayered films, porous hollow spheres, layer-by-layer-deposited (LbL) films, etc. I will present several practical examples of the 2D inorganic/graphene nanosheets and their nanohybrids with tailorable physicochemical properties and functionalities such as electrochemical activity, photocatalytic activity, redox catalytic activity, electrocatalytic activity, gas adsorption capability, and nanobio application. References (1) Gunjakar, J.; Kim, T. W.; Kim, I. Y.; Lee, J. M.; Hwang, S. -J.* Nat. Sci. Rep. 2013, 3, 2080. (2) Kim, T. W.; Kim, I. Y.; Jung, T. S.; Ko, C. H.; Hwang, S. -J.* Adv. Funct. Mater. 2013, 23, 4377. (3) Shin, S. I.; Go, A.; Kim, I. Y.; Lee, Y.; Hwang, S. -J.* Energy Environ. Sci. 2013, 6, 608. (4) Gunjakar, J. L.; Kim, I. Y.; Lee, J. M.; Lee, N. S.; Hwang, S. -J.* Energy Environ. Sci. 2013, 6, 1008. (5) Kim, I. Y.; Park, S. H.; Kim, H.; Park, S.; Ruoff, R. S.; Hwang, S. -J.* Adv. Funct. Mater. 2013, Web-published. (6) Gunjakar, J.; Kim, T. W.; Kim, H. N.; Kim, I. Y.; Hwang, S. -J.* J. Am. Chem. Soc. 2011, 133, 14998. (7) Kim, H. N.; Kim, T. W.; Kim, I. Y.; Hwang, S. -J.* Adv. Funct. Mater. 2011, 21, 3111. (8) Kim, T. W.; Yoo, H.; Kim, I. Y.; Han, A. R.; Chang, J. -S.; Lee, J. S.; Hwang, S. -J.* Adv. Funct. Mater. 2011, 21, 2301.

Authors : Evgeny Borovin*, Sandra Diré*, Emanuela Callone*, Francois Ribot 1,2,3
Affiliations : * Dipartimento di Ingegneria Industriale, Università di Trento, via Mesiano 77, 38123 Trento, Italia 1 Sorbonne Universités, UPMC Univ Paris 06, UMR 7574, Chimie de la Matière Condensée de Paris, F-75005, Paris, France 2 CNRS, UMR 7574, Chimie de la Matière Condensée de Paris, F-75005, Paris, France 3 Collège de France, UMR 7574, Chimie de la Matière Condensée de Paris, F-75005, Paris, France

Resume : In this work the synthesis of hybrid thiol-functionalized Si-based Nano Building Blocks (NBBs) was performed by controlled hydrolysis-condensation of 3 Mercaptopropyltrimethoxysilane (McPTMS) exploiting the in-situ water production (ISWP) by esterification of 1-propanol with chloroacetic acid. The influence of condensation promoters as trifluoroacetic acid (TFA) and dibutyltin dilaureate (DBTL) on the NBBs structural evolution was evaluated by size exclusion chromatography (SEC), FTIR and 29Si NMR. The growth of Si oligomers in solution was analyzed according to the ratio r = [carboxylic acid] / [McPTMS]. According to SEC, the gradual increase of molecular weight of oligomers is observed with TFA increasing the water availability from r=1 to r=6. DBTL promotes a wider distribution of oligomers with the formation of species up to 9000 Da, but for r = 6 the MW distribution is similar to the corresponding sample with TFA. The structural evolution of the Si-based NBBs during the reaction in solution was studied by 29Si NMR measurements in the time range 0.5-24 hours. At the initial stage of the reaction, extensive trans-esterification takes place between the methoxy groups of McPTMS and 1-Propanol. With increasing reaction time, non-random cyclization is observed with the formation of cage-like structures. A further increase in reaction time up to 80h yields a narrowing of the species distribution with the formation of T8 units (about 50%).

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SESSION Q.4 : Uli Wiesner
Authors : Tom Engel, Lucie Struncová, Guido Kickelbick
Affiliations : Saarland University, Inorganic Solid State Chemistry, Am Markt Zeile 3, 66125 Saarbrücken, Germany

Resume : Self-healing materials based on reversible crosslink-formation in polymeric matrices became a major research area in materials chemistry in recent years. In this report we present self-healing hybrid inorganic-organic nanocomposites based on thermoreversible Diels-Alder (DA) reactions. Silica as well as magnetite nanoparticles were surface-functionalized with dienes or dienophiles. These particles crosslink and decrosslink a polymer matrix containing the counterpart functional groups at temperatures of approx. 60°C and 120°C, respectively. It can be shown that the density of the functional groups on the surface is a crucial parameter to obtain good crosslinking behavior. Dienes or dienophils which are located just above the surface separated by small spacer groups require enough space to undergo DA reactions. The density of functional groups on the nanoparticle surface can be increased by grafting-from polymerization of polymers containing the necessary groups. This results in core-shell nanoparticles that are able to act as multicomponent crosslinkers in the self-healing matrix. Magnetite based nanocomposites can be heated to reach the crosslinking/decrosslinking temperatures by alternating magnetic fields. Finally, we were able to show that the self-healing mechanism in these materials is reproducible and we could prove that the mechanical properties of the nanocomposites after healing are similar to those of the original materials.

Authors : Virginie VERGNAT, Benoît HEINRICH, Michel RAWISO,* René MULLER,° Geneviève POURROY, Patrick MASSON
Affiliations : Institut de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg, CNRS UMR 7504, 23 rue du Lœss, BP 43, F-67034 Strasbourg Cedex 2, France *Institut Charles Sadron, CNRS UPR 22, 23 rue du Lœss, BP 84047, F-67034 Strasbourg Cedex 2, France °Ecole de Chimie, Polymères et Matériaux, 25 rue Becquerel, F-67087 Strasbourg Cedex 2, France

Resume : Magnetic iron-based oxide embedded within a polymer matrix has wide potential application, for instance as magnetic absorbent. Various concentrations of magnetic materials up to 50 wt% have to be considered in order to reach the highest magnetic permeability levels. Meanwhile, the mechanic properties have to be preserved and the permittivity has to be controlled. For this purpose, we have undertaken the elaboration of polymer/magnetic oxide materials using a grafting from method. Non aggregated iron oxide nanoparticles were obtained by thermal decomposition. An atom transfer radical polymerization (ATRP) initiator was covalently grafted onto the oxide surface. Then, monomer (styrene or methyl methacrylate) was polymerized from the initiator-grafted nanoparticles to obtain the hybrid material. Nanoparticles were well dispersed in the polymer as shown by transmission electron microscopy. Small angle X-ray scattering (SAXS) measurements and small angle neutron scattering (SANS) were used to characterize the oxide core and the polymer shell respectively. The oxide core size measured by SAXS was equal to 6-8 nm, in consistency with dynamic light scattering and transmission electron microscopy measurements. The investigations by SANS of the about 30 nm dry diameter nanoparticle shell showed that the morphology of polymer chain as a function of the distance to the iron oxide core can be accurately described by the model initially proposed by Cotton and Daoud for star polymers. Moreover, the rheological behavior of hybrid material was studied in the molten state of the polymer and the variations of storage and loss moduli as a function of frequency also follow the typical behavior of star polymers.

Authors : Seung-Mo Lee, 1,2,* Eckhard Pippel,3 Oussama Moutanabbir,4 Jae-Hyun Kim, 1,2 Hak-Joo Lee, 1 and Mato Knez5,6
Affiliations : 1 Department of Nanomechanics, Nano-Mechanical Systems Research Division, Korea Institute of Machinery & Materials (KIMM), 156 Gajungbukno, Yuseong-gu, Daejeon, 305-343, Korea 2 Nano Mechatronics, University of Science and Technology (UST), 217 Gajeong-ro, Yuseong-gu, Daejeon 305-333, South Korea 3 Max Planck Institute of Microstructure Physics, Weinberg 2, D-06120 Halle, Germany 4 Department of Engineering Physics, Ecole Polytechnique de Montreal, C.P. 6079, Succ. Centre-Ville, Montréal, Québec, H3C 3A7 Canada 5 CIC nanoGUNE Consolider, Tolosa Hiribidea 76, E-20018 Donostia - San Sebastian, Spain 6 IKERBASQUE, Basque Foundation for Science, Alameda Urquijo 36-5, E-48011 Bilbao, Spain

Resume : Natural materials consisting of protein structures impregnated with a tiny amount of metals often exhibit impressive mechanical behavior, which represents a new design paradigm for the development of biomimetic materials. However, due to the absence of proper synthetic methods and the scanty information on the structure of the natural materials, the materialization has still remained a longstanding challenge. Here, by applying a modified Al2O3 atomic layer deposition process to the dragline silk of Nephila pilipes spider, we produced Al-infiltrated silks, which showed unusual mechanical properties. The deformation behavior of the molecular structure of the Al-infiltrated silk has been investigated performing in-situ Raman spectroscopy, where Raman shifts were measured concurrently with macroscopic mechanical deformations. For identifying the role of the infiltrated Al atoms, the study has been performed in parallel with untreated silk and the results have been compared. We found that the infiltrated Al induce serious changes to the hydrogen bondings interconnecting the protein structures of the silk, resulting in the size reduction of the β-sheet crystals. Our experimental results revealed that superior mechanical properties of the Al-infiltrated silk are likely to be caused by the alterations of the sizes of the β-sheet crystals and their distributions.

Authors : Heesuk Kim*, Sang-Soo Lee, Jang Yeol Lee, Jaeyoo Choi
Affiliations : Photo-electronic Hybrids Research Center, Korea Institute of Science and Technology (KIST), Seoul, Korea

Resume : Recently there has been a surge of interest in reducing the demand for fossil fuels by developing alternative renewable energy technologies. Thermoelectric materials are useful in converting waste heat to useable electrical energy. However, while thermoelectric materials based on inorganic semiconductors show the high efficieny, they are very expensive, brittle and chemically unstable under ambient condition. Therefore, it is useful to investigate more flexible and stable sources of thermoelectric power. In this study, we present the flexible and chemically stable thermoelectric materials based on nanocarbon (reduced graphene oxide)/Te nanowires composites. Te nanowire (TeNW) was selected due to its high thermopower from 1D quantum confinement effect and easy production of solution process. Nanocarbon such as reduced graphene oxide (rGO) plays an important role to give a good electrical conductivity and stable and flexible frame for composites. TeNWs coated with PEDOT:PSS were mixed with graphene oxides and their hybrid films were prepared by vacuum filtration. By controlling the reduction of the hybrid film by chemical reductant, the electrical and thermoelectric properties of hybrid films were characterized. The morphology of hybrid film was characterized using TEM and SEM. The hybrid film shows the improved thermoelectric efficiency due to the energy filtering effect on the interfaces between rGO and PEDOT:PSS-TeNW.

Authors : A. Mitraki (1,2) *, K. Terzaki (1,2), E. Kalloudi (1), M. Vamvakaki (1,2), M. Chatzinikolaidou (1,2), M. Farsari (2)
Affiliations : 1) Department of Materials Science and Technology, University of Crete, Heraklion, Greece; and 2) Institute of Electronic Structure and Laser (IESL) FORTH, Greece

Resume : Peptide nanofibers and nanotubes can act as templates for the growth of inorganic materials, such as metal nanoparticles, silica, etc. [1, 2]. These hybrid bio-inorganic materials are promising for their integration in future generations of micro- and nano- devices. Their controlled positioning and manipulation is necessary towards achieving these goals; we have been using femtosecond laser technologies towards fabrication of scaffolds destined for their controlled positioning [3]. Moreover, we recently developed a novel “scaffold-on-scaffold” strategy, i.e. a combination of primary laser-fabricated scaffolds with attached secondary peptide scaffolds that could be used as a support for the directed growth of cells into biomineralized units. More specifically, we fabricated primary scaffolds by femtosecond laser writing of an amine containing photosensitive hybrid material. We then decorate these scaffolds with a gold monolayer which immobilizes novel self-assembled peptides. The peptides were further modified to contain acidic amino acids, in order to promote the deposition of calcium phosphates. These hybrid scaffolds strongly support attachment and proliferation of a preosteoblastic cell line and exhibit a statistically significant increase of biomineralization [4]. This approach combines the advantages of top-down laser fabrication (i.e. the possibility to control the scaffold geometry and micro-nano-topography) with the bottom-up design possibilities of the self-assembling peptides. References [1] E. Kasotakis, et al., (2009) Biopolymers 92: 164 [2] E. Kasotakis and A. Mitraki, (2012) Biopolymers 98:501 [3] V. Dinca et al., (2008) Nanoletters 8: 538 [4]. K. Terzaki et al., (2013) Biofabrication 5:045002

POSTER SESSION I : First Session
Authors : N.V. Roik, L.A. Belyakova, M.O. Dziazko
Affiliations : Chuiko Institute of Surface Chemistry of NAS of Ukraine, 17 General Naumov Str., Kiev, 03164, Ukraine

Resume : Control entry into the pores and subsequent release of biologically active compounds can be carried out by design of the functionality of the pore walls and exterior surface of mesoporous silica lined with the reactive silanol groups. In the present work, we propose the approach for synthesis of pH-sensitive amino-containing nanovalves located near the entrances into the pores at the external surface of MCM-41 silica. Selective chemical functionalization of mesoporous silica particles with ionizable N-(2-aminoethyl)-3-aminopropyl (AEAP) or N-[N'-(N'-phenyl)-2-aminophenyl]-3-aminopropyl (PAPAP) groups was performed by combination of sol-gel condensation and postsynthetic chemical modification. The results of X-ray diffraction and low-temperature ad-desorption of nitrogen indicate that immobilization of AEAP or PAPAP groups on the outer surface of silica particles does not change mesoporous structure of initial silicas. Release properties of MCM-41-type mesoporous silicas selectively modified with AEAP or PAPAP groups were studied for para-aminobenzoic acid. It was found that localization of blocking groups near by pore orifices provides preservation of high loading capacity of carriers and controlled liberation of biologically active compound at pH change. Blocking of pore openings arising from interactions between closely attached amino-containing functional groups of carrier at pH = 6.86 leads to the prevention of para-aminobenzoic acid release, whereas at pH = 1.00 repulsion of protonated amino groups provides unhindered extraction of aromatic amino acid from its mesoporous channels.

Authors : Tien Jung Huang
Affiliations : Industrial Technology Research Institute Material and Chemical Research Laboratories

Resume : Due to polysulfone (PSf) is extensively used in blood purification applications (such as artificial kidney dialysis). This study uses the strategy of hydrophilic the surface of a material, which can predict and sift out its compositions, calculate the properties of interface, and predict the contact angle by using the molecule design technology. We also develop a new HAR-b-(mPEG) polymer of a hydrophilic molecule fiber structure which has a highly aromatic main chain section for increasing the compatibility with the polysulfone material. After the surface property of a new material is established and the compatibility with the polysulfone material is calculated by simulation, the results are obtained which shows: (1) the linker structure bonded between the hydrophilic and hydrophobic chains has little impact; (2) the long chain section PEG contributes mainly to the hydrophilic properties of the material; and (3) the compatibility with the polysulfone is decreased when the molecular weight is higher than 880. These features may expose the hydrophilic PEG chain to the surface, so that the effect of repelling the adsorption of protein and platelet is achieved.

Authors : Ana Maria do Espírito Santo 1 Luís Eduardo Silva Soares 2
Affiliations : 1 Universidade Federal de São Paulo, UNIFESP, Departamento de Ciências Exatas e da Terra 2 Universidade do Vale do Paraíba, UNIVAP, Dental Materials and Operative Dentistry Department, Research and Development Institute, IP&D

Resume : Micro energy-dispersive X-ray fluorescence spectrometry (µ-EDXRF) was performed to evaluate the mineral content of human and bovine dentin treated with a total-etch adhesive (Prime & Bond 2.1® - PB) and a self-etching adhesive (Xeno III® - X). Ten human molars (H) and ten bovine anterior teeth (B) were prepared exposing the dentin, divided at the middle and separated into four groups: HPB (control), HX, BPB and BX. µ-EDXRF data were obtained before and after treatments. Untreated dentin of both substrates was not different in Ca content (p< 0.1503), P content (p< 0.2986) and Ca/P ratio (p< 0.1400). HX and BX specimens showed reduced P content (p< 0.0001 and p< 0.0002), HPB and BPB reduced Ca and P content (p< 0.0001; p< 0.0001) when compared to untreated specimens. The Ca/P ratio was significantly higher in HPB and BPB than in HX and BX (p< 0.0001; p< 0.0080). No statistical differences were found between substrates considering the same adhesive. Untreated dentin showed a homogeneous elemental distribution. After adhesive treatments the surface showed an irregular demineralization pattern.

Authors : Meng Lan, Guoli Fan, Feng Li
Affiliations : State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, P.R.China.

Resume : Nowadays, rapid and efficient remediation solutions to the polluted water have been arousing considerable attention[1]. Layered double hydroxides (LDHs, MII 1-xMIII x(OH)2]x+ (An-)x/n •mH2O) are composed of charged brucite-like layers of divalent and trivalent metal hydroxides, whose excess positive charge is balanced by anions (often carbonate) in the interlayer [2]. In the present work, for the purpose of combining the unique properties of graphene with LDHs to obtain excellent photocatalyst, we developed a facile and effective one-step coprecipitation approach for synthesis of hybrid composites of ZnCr-LDH/graphene photocatalysts. The results revealed that ZnCr-LDH/graphene composites showed much higher photocatalytic activity in the degradation of RhB under visible light irradiation, as compared with pure ZnCr-LDH, which was attributable to unique hetero-nanostructure of ZnCr-LDH/graphene composites facilitating the transportation and separation of the photogenerated electron-hole pairs and thus the continuous generation of reactive oxygen species. The present finding provides a simple approach to fabricate new types of excellent graphene-based hybrid photocatalysts for pollutant water. Reference [1] Y.J. Zhang, L.C. Liu et al., J. Hazard. Mater. 209-210 (2012) 146-150. [2] C.G. Silva, Y. Bouizi, et al., J. Am. Chem. Soc. 131 (2009) 13833-13839.

Authors : Christian Bagdahn; Andreas Taubert
Affiliations : Institute of Chemistry, University of Potsdam, D-14476 Potsdam

Resume : Ionogels are interesting because they combine the macroscopic properties of a material such as stiffness with “microscopic” properties such as catalytic activity. In many cases high surface areas or the functionalization of existing surfaces is useful or even mandatory for proper function of a material. While there are now many protocols available for producing ionogels as such, including ionogels with catalytic, sensing, diagnostic, tailred transport, or luminescent activity, the overwhelming fraction of ionogels is a bulk-like material with very low surface area. A cheap and well-established way of generating moderate surface areas is electrospinning. We will present new data on the electrospinning of ionogels, on the adaptability of the process and on first attempts to transform the electrospun materials into functional materials either by incorporating a functional (that is, metal-containing) ionic liquid or by further chemical transformation of the electrospun ionogel fiber mats.

Authors : Mathias Junginger; Doreen Hentrich; Andreas Taubert
Affiliations : Institute of Chemistry, University of Potsdam, D-14476 Potsdam

Resume : Calcium phosphate is a key mineral in biology and biomaterials science. The bioinspired synthesis of calcium phosphates from aqueous solution at near-physiological conditions has attracted tremendous interest because it should be possible to grow biosimilar calcium phosphate/organic hybrid materials that could find use in numerous applications such as bone substitutes or dental repair. In spite of the large body of work that has been published on the topic of bioinspired, polymer-controlled calcium phosphate precipitation the field still lacks a complete atomistic and (supra)molecular understanding of how calcium phosphate nucleation, growth, morphogenesis, and phase selection is governed by a specific set of conditions such as the type, concentration, and molecular weight of the organic or polymeric additive. For example, while there are numerous studies of calcium phosphate formation from bulk aqueous solution, the number of studies on the effects of surfaces and interfaces is fairly low. Moreover, most of these studies focus on the effects of polyanionic crystallization additives and the number of studies on polycationic growth modifiers is still limited, as is the case for investigations of polybetaines and polyampholytes. We therefore focus (i) on the role of surfaces and interfaces and (ii) on the effects of polycations on calcium phosphate mineral formation. The presentation will give an overview over the results obtained from a set of different scaffolds

Authors : G. Cacciato, M. Zimbone, F. Ruffino, G. D’Arrigo, A. Sciuto, M. G. Grimaldi
Affiliations : G. Cacciato, M. Zimbone, F. Ruffino, M. G. Grimaldi Dipartimento di Fisica ed Astronomia-Università di Catania and MATIS IMM-CNR, via S. Sofia 64, 95123 Catania, Italy; G. D’Arrigo, A. Sciuto Consiglio Nazionale delle Ricerche – Istituto per la Microelettronica e Microsistemi (CNR-IMM) VIII Strada 5, 95121 Catania, Italy;

Resume : The realization of new class of devices, for healthcare, is driven by the development of new hybrid materials that assemble together biological and inorganic nano-sized units. Our aim is to develop a biosensor for DNA exploiting the transport properties of Au nanoparticles (NPs) realized onto a SiO2 surface; in particular our final goal is the detection of a mutation of the KRAS gene for the diagnosis of colorectal cancer. The device measures the change, due to the presence of DNA, of tunnel current flowing through NPs arranged in one-dimensional arrays. This kind of device needs a full control of the SiO2-Au, Au-thiolated DNA and DNA-DNA interface as well as NPs shape and spacing. This work presents the design optimization of the device in terms of NPs density, size, and spacing and preliminary results about their electrical response. In particular, we present the growth characteristics of Au NPs onto SiO2, arranged into arrays of lines of ~100 nm width and ~70 µm length. The array are obtained by e-beam lithography followed by Au thin film sputter deposition, PMMA removal and annealing. By microscopic analyses, we analyze the temperature dependence of the NPs morphological properties and their evolution is described within the mean field nucleation model. As a consequence the full control, by annealing temperature and time, of the NPs characteristics is reached in order to optimize the array electrical detection sensitivity, studied by the conductive-AFM technique.

Authors : Ludmila Vovchenko, Ludmila Matzui, Oleksiy Brusilovets, Alexander Shames
Affiliations : Kyiv National Taras Shevchenko University, Departments of Physics1 and Chemistry2 Kiev, Ukraine; Department of Physics, Ben-Gurion University of the Negev, Be’er-Sheva, Israel

Resume : The influence of synthesis conditions (type and ratio of chemical precursors, temperature of treatment) on the phase composition and morphology of ferrite powders containing barium hexaferrite has been investigated. The ferrite powders have been synthesized by using sol-gel technique at the various temperatures – 850, 950 and 1050C. The light and atomic force microscopy studies have shown that prepared ferrite powders consist of the particles with size 50-100 nm, which agglomerate into formations with size from 1 to 5 microns. XRD studies have showed that the synthesized powders consist of two phase – Fe2O3 and BaFe12O19 and ratio between these phase depends on the temperature of powder treatment at last stage of synthesis. The measurements of magnetic susceptibility in the temperature range 300-850К also confirm the presence of two phase in prepared ferrite powders and correlate with XRD data. It was found that the using of Fe(NO3)3•9H20 and Ba(NO3)2 (at molar ratio 12:1, respectively) as precursors and the temperature treatment at 950C is the most optimal regime for preparing the ferrite powder with maximal content of BaFe12O19. The ESR spectra for prepared ferrite powders indicate on the total magnetic anisotropy, which includes an internal magnetic anisotropy and shape anisotropy of magnetic particles. The prepared barium hexaferrite powder has been used as a filler for fabrication of epoxy composites for electromagnetic shielding investigations.

Authors : Tien-Jung Huang , Shin-Pon Ju , Chien-Chia Chen, and Hsin-Lung Chen
Affiliations : Material & Chemical Research laboratories, Industrial Technology Research Institute, Hsinchu, TAIWAN; Department of Chemical Engineering, National Tsing Hua University, Hsinchu 300, Taiwan ; Department of Mechanical and Electro-Mechanical Engineering, National Sun Yat-Sen University, Kaohsiung, TAIWAN *70 Lienhai Rd., Kaohsiung 80424, TAIWAN

Resume : Molecular dynamics (MD) simulation was used to simulate the mechanical properties of the interfaces of polypropylene (PP) and modified polypropylene with the graphene(Gh) in order to explore the interfacial strength between the carbon fiber and PP and modified PP in the experimental observation. First, the structures of PP and modified PP were put on the graphene surface and the simulated-annealing procedure was conducted to obtain the stable interface structures and these structures were further used to evaluate the bonding strength of PP and modified PP with the graphene surface. The degree of crystallinity of the modified PP is significantly improved and higher than that of the pristine PP. Also the mechanical strength by tensile simulation indicated the strength of the modified PP/graphene is higher. Finally, the MD simulation results of PP/Gh and modified PP/Gh hybrid obtained in this research are consistence with experimental data.

Authors : Klára Melánová 1, Ludvík Beneš 2, Jan Svoboda 1, Vítězslav Zima 1, Milan Vlček 1
Affiliations : 1 Institute of Macromolecular Chemistry of Academy of Sciences of the Czech Republic, v.v.i., Heyrovský Sq. 2, 162 06 Prague 6, Czech Republic; 2 University of Pardubice, Faculty of Chemical Technology, Studentská 95, 532 10 Pardubice, Czech Republic

Resume : Layered tetravalent metal organophosphonates represent an important group of inorganic-organic hybrid compounds due to their excellent stability and the possibility to modify the organic part of these compounds with functional groups. Among them, zirconium phosphonates were the most thoroughly investigated, less attention has been paid to cerium phosphonates. Cerium(IV) phenylphosphonate was prepared by reaction of cerium sulfate or ammonium cerium nitrate with phenylphosphonic acid at various conditions. Three types of compounds were obtained. A yellow hydrated compound with a basal spacing of 15.5 Å was prepared by precipitation at room temperature. A white anhydrous compound with basal spacing of about 14.8 Å was prepared using a hydrothermal synthesis at 100°C or by solid state reaction. Another anhydrous compound with a basal spacing of 15.6 Å was formed by a hydrothermal treatment at 180°C. New functionalized layered cerium phenylphosphonates were prepared by reaction of cerium salt with corresponding phosphonic acid (4-carboxyphenylphosphonic, 4-sulfamoylphenylphosphonic, 1,4-benzenediphosphonic, and 4-sulfophenylphosphonic acid). The compounds prepared were characterized by EDX, elemental analysis, TGA and powder X-ray diffraction. This work was supported by Czech Science Foundation (grant no. 14-13368S).

Authors : Klára Melánová 1, Ludvík Beneš 2, Jan Svoboda 1, Vítězslav Zima 1, Petr Knotek 2
Affiliations : 1 Institute of Macromolecular Chemistry of Academy of Sciences of the Czech Republic, v.v.i., Heyrovský Sq. 2, 162 06 Prague 6, Czech Republic; 2 University of Pardubice, Faculty of Chemical Technology, Studentská 95, 532 10 Pardubice, Czech Republic

Resume : Organic pi-conjugated compounds are of interest for a wide scientific community due to their unique properties. These properties can be enhanced by incorporation of these compounds into an interlayer space of layered hosts. Materials prepared in such a way have the advantage, relative to organic compounds, of improved rigidity and thermal stability. In this contribution we describe intercalation of tris(4-(pyridin-4-yl)phenyl)amine (TPPA) into alpha-modification of zirconium phosphate (ZrP) and into zirconium 4 sulfophenylphosphonate (ZrSPP). The formulas of these compounds might be written as Zr(HPO4)2•0.21TPPA•2.5H2O and Zr(HO3SC6H4PO3)1.3(C6H4PO3)0.7•0.35TPPA•2.5H2O. The interlayer distance of the ZrP•TPPA intercalate is 18.52 Å and the interlayer distance in the ZrSPP•TPPA intercalate is 33.2 Å. From the enlargement of the interlayer distance after intercalation we can presume that the TPPA molecules are oriented perpendicularly to the host layers of ZrSPP and slightly tilted to the layers of ZrP. The way of interaction between the host material and the intercalated TPPA molecules was studied by infrared and UV-vis spectra. This work was supported by Czech Science Foundation (grant no. 13-01061S).

Authors : Marina Lang,1 Emilie Delahaye,1 Driss Ihiawakrim,1 Ovidiu Ersen,1 Dominique Foix,2 Jean-Marc Grenèche,3 Guillaume Rogez,1 Pierre Rabu1
Affiliations : 1 Institut de Physique et Chimie des Matériaux de Strasbourg, UMR7504 CNRS-UNISTRA and NIE, 23 rue du Loess, B.P. 43, 67034 Strasbourg cedex 2, France. 2 IPREM-ECP (UMR5254), 2, avenue du Président Angot, 64053 Pau cedex 9, France. 3 Institut des Molécules et Matériaux du Mans (IMMM), UMR CNRS 6283, Université du Maine, 72085 Le Mans Cedex 9 France

Resume : The growth of low-dimensional Prussian blue analogues (PBA) network between magnetic metal hydroxide layers is particularly attracting to study the influences of confinement or dimensionality on the properties of PBA. Insertion of PBA was already reported as weakly bonded counter anions into double layered hydroxides.[1] Insertion of PBA into layered simple hydroxides (LSH) leads to different reactivity. We attempted to insert potassium or sodium hexacyanoferrate(II) into cobalt or copper hydroxyacetate. We will detail here how such a reaction led, unexpectedly, to the direct formation of PBA nano-platelets, the layered hydroxide serving as a metal ion reservoir. The lamellar structure of the starting LSH transforms to PBA platelets via a pseudomorphic transformation.[2] All products were characterized by PXRD, SEM, TEM and magnetic measurements, completed by XPS and Mössbauer spectroscopy.[3] Finally, replacing the acetates by metal complexes in the starting compound allows for different reactivity and different products. [1] a) I. Carpani et al., J. Solid State Chem. 179, 3981-3988 (2006); b) H. S. Panda et al., J. Phys. Chem. C 113, 9560-9567 (2009); c) G. Layrac, et al., J. Phys. Chem. C 115, 3263-3271 (2011); E. Coronado, et al., Inorg. Chem., 2010, 49, 1313. [2] J. Reboul, et al., Nat Mater 11, 717-723 (2012). [3] M. Lang, E. Delahaye, D. Ihiawakrim, O. Ersen, D. Foix, J.M. Grenèche, G. Rogez, P. Rabu, in preparation.

Authors : Pierre Vialat, Fabrice Leroux, Christine Mousty
Affiliations : Clermont Université, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, UMR-CNRS 6296, BP 80026, F-63171 Aubière Cedex, France

Resume : Layered Double Hydroxides (LDH) are lamellar solids defined by the general formula [M2+1-xM3+x(OH)2]x+ [(An-)x/n, y H2O]. Electroactive cations (Ni, Co) present in the layer structure and/or intercalated redox active anions, i.e. 2,2'-azino-bis(3-ethylbenzothiazoline)-6-sulphonate (ABTS), can confer to these materials specific electrochemical properties. ZnCr-ABTS LDH has already been studied for enzyme immobilization to elaborate biosensors and biofuel cells. The presence of ABTS species into the interlayer domain allows electron transfer between the immobilized laccase and the electrode. In this study, we have synthesized CoAl-ABTS hybrid LDH to combine intralayer electronic transfer due to Co redox species with the interlayer electronic transfer assumed by the presence of ABTS. The improvement of electronic transfer between the LDH particles was also studied by addition of graphene in the system. CoAl-ABTS and CoAl-ABTS@graphene composite were prepared by in situ coprecipitation. The as-obtained materials were then fully characterized by means of XRD, FTIR, Raman spectroscopy, Cyclic Voltammetry and Electrochemical Impedance Spectroscopy to better understand the entire electronic phenomenon that takes place in this composite material. Their application as electrode material for bioanode and biocathode in a lactate/O2 enzymatic biofuel cell was also investigated. Their use as a biocathode exhibits a response 5 times higher than that of ZnCr-LDH for O2 reduction catalysis.

Authors : Fabrice Leroux,1* Antoine Dalod,1 Mohammed Hennous,1,2 Laura Sisti,3 Grazia Totaro,3 Annamaria Celli,3 Christian Coehlo,1 Vincent Verney1
Affiliations : 1Institut de Chimie de Clermont-Ferrand (ICCF), UMR 6296, Blaise Pascal University, 24 av des Landais, 63177 Aubière, France 2Laboratoire de physico chimie des Matériaux,Oran University–BP 1505 El M’naouer, Oran 31000, Algeria 3Dipartimento di Ingegneria Civile, Chimica, Ambientale e dei Materiali, Bologna University, via Terracini 28, 40131 Bologna, Italy

Resume : A series of layered double hydroxides interleaved with surfactant using saturated alkyl chain carboxylate anions CH3(CH2)mCOOH, even number 6 ≤ m ≤ 16, obtained by coprecipitation method was dispersed by melt polymer extrusion into polypropylene (PP), poly(butylene)succinate (PBS) and polydimethylsiloxane (PDMS). First the hybrid LDH materials were investigated by means of X-ray diffraction and Fourier transform IR spectroscopy resulting in the presence of contracted basal spacing over the entire variation of m. Dispersion into polymer yields for all of them intermixed polymer structures, but the rheological behavior is function of the polymer. For PP longer alkyl chain induces a a reinforcement while smaller one induces a plasticizing effect, and for PBS and PDMS a chain-extender-type behavior is observed for the all series. The relative change of viscosity from frequency sweep stress linear response is visualized by Cole Cole plot. The molecular weight change relative to polymer free of filler and obtained from the power-law of the zero-shear viscosity is found to be linearly dependent of the basal spacing increase. Such cross-study using XRD and melt polymer rheology is able to unravel the attritive or plastizicing role of the organoclay as function of the basal spacing expansion, and to respond whether LDH interleaved platelets are of interest for polar and non-polar polymer and finally to predictively monitor the interfacial attrition through surfactant modified LDH.

Authors : Oleg Palamarciuc, Emilie Delahaye, Pierre Rabu, Guillaume Rogez
Affiliations : IPCMS (CNRS-Université de Strasbourg, UMR7504)

Resume : Transition metal Layered Simple Hydroxides (LSH) are particularly well suited to grafting reactions of various organic molecules.[1] However, a major drawback of the functionalization reactions of layered hydroxides lies in the fact that they proceed by anion-exchange reaction, especially effective in aqueous medium. This severely limits the type of molecules that can be considered to be grafted in the interlamellar space. To overcome this difficulty, one solution is to synthesize in situ the desired molecules from a pre-grafted functional precursor.[2] Thus, only the first stage (grafting the precursor) requires the use of insertion-grafting conditions by anion exchange. The following reactions may use a much larger panel of conditions, including the use of non-aqueous solvents. We report in this presentation the post-synthesis modification of a Co LSH, functionalized with p-amino-benzoic acid. We show that the amine groups react in situ with various aldehydes to form imines. Interestingly, conventional activation (heating) is inefficient in the present case, whereas microwave irradiation enables the in situ reaction. This technique constitutes a new appealing strategy for functionalization of layered structures.[3] [1] G. Rogez et al., Chem. Soc. Rev. 40, 1031-1058 (2011). [2] S. S. Y. Chui et al., Science 283, 1148-1150 (1999). [3] O. Palamarciuc et al., New J. Chem., DOI: 10.1039/C3NJ01231J (2014).

Authors : Md. Shahinul Islam, Won San Choi, Ha-Jin Lee
Affiliations : Jeonju Center, Korea Basic Science Institute, 20 Gunjiro, Dukjin-gu, Jeonju, 561-180, Republic of Korea; Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseodaero, Yuseong-gu, Daejeon, 305-719, Republic of Korea; Jeonju Center, Korea Basic Science Institute, 20 Gunjiro, Dukjin-gu, Jeonju, 561-180, Republic of Korea

Resume : We have developed a facile method for the synthesis of poly (allylamine hydrochloride; PAH) polymer assisted and multi-functional groups containing mesoporous calcium silicates (CS-PAH) with a large specific surface area (BET = 348.4 m2g-1) and pore volume (Vp=1.42 cm-3g-1). TEOS was employed as silicon source, which rapidly hydrolyzes and reacts with amine groups of PAH and form spherical nanosheets of Si-PAH, subsequently Ca2 creased furrows in the nanosheets as building blocks in basic media. The obtained highly porous and multifunctional 3D network of CS-PAH containing excess of Ca2 and NH3 enriches the surfaces with huge cationic charges (ζ = 65.66 mV) and results in extremely higher loading of anionic drugs or protein. Ibuprofen (IBU) and FITC labeled bovine albumin (FITC-Albumin) were chosen as a model drug and protein respectively for testing loading and delivery proficiency of CS-PAH. Ultrahigh drug loading capacities (DLC) and their released patterns have been investigated under controlled pH conditions. Strikingly, the highest DLC reported so far (3.6 mg IBU is loaded in per mg carrier) has been achieved in this work. Furthermore, CS-PAH can entirely transform to hydroxyapatite after the drug release in simulated body fluid (SBF), implying the good bioactivity and biodegradability of CS-PAH. Since the CS-PAH drug-delivery system combines the advantages such as large specific surface area, large pore volume, extremely high DLC, adjustable drug-release rate, and great bioactivity, therefore it is promising for reducing systemic side effects.

Authors : L. Boudaoud1,3, N. Sekkal1, F. Tair2
Affiliations : (1) Département de Physique-Chimie, Ecole Normale Supérieure de l’Enseignement d’Oran (2) Département de Physique, Université des Sciences et Technologie Mohamed Boudiaf d’Oran. (3) Unité de recherche en énergie renouvelables au milieu saharen, centres de développement des énergies renouvelables Alger

Resume : The electronic properties of the ScxGa1-xAs ternary alloy and superlattice (SL) systems are investigated within the first principles full potential linear muffin-tin orbitals method (FPLMTO) in its atomic sphere approximation (ASA) coupled to the technique of the empty spheres which enables an accurate treatment of the interstitial regions. It is found that the alloy concentration for which the transition from rock salt (B1) to zinc blende (B3) structure occurs is around x =58.6% and that these systems may have a large semiconducting gap in the zinc blende (B3) phase and that for SLs, this gapis direct at Γ.

Authors : V. Torrisi1, F. Ruffino2, I. Crupi2, M.G. Grimaldi2, G. Marletta1
Affiliations : 1Laboratory for Molecular Surface and Nanotechnology (LAMSUN), Department of Chemical Sciences, University of Catania and CSGI, Viale A. Doria 6, 95125, Catania, Italy; 2Dipartimento di Fisica ed Astronomia-Università di Catania, and MATIS IMM-CNR, via S. Sofia 64 95128 Catania, Italy.

Resume : Semiconducting polymers/Au nanograins based hybrid multilayers (HyMLs) were fabricated on p-Si single-crystal substrate by an iterative method that involves, respectively, spin-coating technique (for the deposition of organic films) and sputtering technique (for the deposition of metal nanograins) to prepare Au/HyMLs/p-Si Schottky device. Other semiconducting polymers/synthetic metals (SM) based hybrid multilayers (HyMLs) were fabricated on p-Si single-crystal substrate by an iterative method that involves, respectively, spin-coating technique (for the deposition of semiconducting films) and spray technique (for the deposition of the synthetic metal films) to prepare Au/HyMLs/p-Si Schottky device. The electrical properties of the Au/HyMLs/p-Si Schottky devices were investigated by current-voltage (I–V) measurements in the thickness range of 1-5 bilayers (BL). At different number of layers, current-voltage (I–V) measurements were performed. Results showed a rectifying behavior. Junction parameters, such as barrier height (BH), from the I–V measurements were obtained. In particular, the contribute to the effective BH increase (or decrease) do to each semiconducting or metallic (organic or inorganic) layer was calculated using a phenomenological model1. A comparison study between two different (Au nanograins and SM) based HyMLs was performed. 1. V. Torrisi, F. Ruffino, G. Isgrò, I. Crupi, G. Li Destri, M.G. Grimaldi, G. Marletta Appl. Phys. Lett. 103 193117 (2013).

Authors : Sayani Majumdar, Sebastiaan van Dijken, Katarzyna Grochowska, Mirek Sawczak and Gerard Sliwinski
Affiliations : Nanospin, Department of Applied Physics, Aalto University School of Science, FI-00076, Finland; Photophysics Department, Szewalski Institute of Fluid Flow Machinery, Polish Academy of Sciences, 80-952 Gdansk, Poland

Resume : For spintronic components inorganic ferromagnetic oxides like La0.7Sr0.3MnO3 (LSMO) and organic semiconductors form a promising combination of 100% spin polarization and very long spin relaxation length. However, fabrication of hybrids requires high temperature growth in oxygen ambient for LSMO and evaporation or spin coating in vacuum or inert atmosphere for the organics. This requires sample manipulation between both deposition steps and results in contamination (C, O, other impurities) which deteriorate the interface energetics significantly. In this work the growth of the organic semiconductor material performed consecutively after that of the inorganic ferromagnet without changing the processing chamber is investigated. This minimizes the contamination effect and consequently the improved interface properties and spintronic performance are expected. The PLD at 1064 nm, 2 Hz and fluences around 0.18 J/cm2 is used to produce organic semiconductor thin films of Rubrene, a material known for high carrier mobility. The AFM and x-ray reflection data show continuous films in all the grown samples with very small surface roughness. Raman spectra of the 7 nm thin film reveal signature consistent with active modes of the Rubrene molecule. The XPS and magneto-transport studies of interfaces and devices grown under similar condition are currently underway and are expected to lead to improved control over the formation of hybrid interface and novel device performance in near future.

Authors : Olga Petrova, Roman Avetisov, Andrew Khomyakov, Rasim Saifutyarov, Igor Avetissov
Affiliations : D.Mendeleyev University of Chemical Technology of Russia

Resume : Hybrid materials based on borate glass matrix and the tris(8-hydroxyquinoline) aluminum, gallium and indium (Mq3 = Alq3, Gaq3 and Inq3) organic phosphors, which are used as light emitting materials in OLED were synthesized by two methods. Bulk hybrid materials (BHM) were synthesized by melting of dried В2О3 and powdered Mq3 (0.02–0.1 wt. %) at temperatures below Mq3 decay during 10-60 minutes in glassy carbon crucibles. Samples were obtained by melt freezing or by pulling of thick fibers. According to XRD analysis the samples were amorphous (glass samples) and were free from visible inclusions and bubbles. Thin-film hybrid materials (TFHM) were made by vacuum thermal sputtering. In the case of 100 to 300 nm TFHM containing ~ 1 vol.% of Mq3 we succeeded to measure photo and electroluminescence. The influence of glass melting parameters on BHM’s spectral properties showed that the synthesis duration increase resulted to a luminescence maximum shift towards shorter wave lengths in comparison with pure crystalline Mq3. The luminescence bandwidths of the synthesized BHM's were considerably larger than that of the initial crystalline Mq3, which might be caused by a presence of a large number of emitting centers of different conformations in BHM's and by the levels splitting by the crystal field of the inorganic matrix.

Authors : Wang Jiyuan, Guo Feng
Affiliations : Research Institute of Sinopec Yangzi Petrochemical Co., Ltd., Nanjing 210048, Jiangsu, China

Resume : Polyvinyl chloride (PVC) is one of the most extensively applied membrane materials in the industry for its robust mechanical strength, low cost, and excellent chemical properties (e.g., acid, alkali, and solvent resistance). However, its hydrophobic nature that often results in severe membrane fouling and decline of permeability, has been a barrier for their application in waste water treatment. Many studies have attempted to improve the hydrophilicity of PVC membranes with various techniques, such as physical blending, chemical grafting and surface modification. Among these methods, blending with inorganic materials is interesting due to its convenient operation and mild condition. Recently, the sol–gel technique has provided new opportunities for the preparation of organic-inorganic hybrid materials. The objective of this work was to systematically reveal the structure, morphology, hydrophilicity, as well as permeability and mechanical properties of the hybrid PVC–SiO2 membranes prepared by sol–gel method. Results showed that silica had been successfully immobilized on the surface of membranes and –OH groups on the SiO2 particles were generated according to the FTIR analysis. SEM pictures showed the morphology of PVC–SiO2 composite membranes changed from cavity structure to finger-like pore structure and asymmetric cross-section structure with increasing SiO2 sol concentration. The hydrophilicity and permeability property of PVC–SiO2 composite membranes were further examined. The addition of SiO2 sol not only intensified the interaction force among PVC macromolecules, but also formed a crosslinking structure between polymeric chains and SiO2 particles, and led to the increase of the mechanical properties.

Authors : Shi-ichi AOQUI, Kazuhiro NAGAHAMA, Fumiaki MITSUGI
Affiliations : Department of Computer & Information Sciences, Sojo Univ., Department of Applied Microbial Tech., Sojo Univ., Graduate School of Science & Tech., Kumamoto Univ.

Resume : A surface treatment with atmospheric pressure plasma is expected in many fields. The reason are as followings; processing is possible in dry environment, generally a processing time is short and most of harmful waste is not exhausted. In recent years not only channeling, hardening and a protection but also sanitization, sterilization have been expected as surface treatment by plasmas. In this study, we developed a new system that UV light source was equipped with by the system, and, as well as plasma, UV light irradiation and ozone can be formed, was which could irradiate a surface with serpentine plasma. Plasma irradiation was carried out for green mold attached to on materials surface, and, using this system, a sanitization effect was investigated. Serpentine plasma is generally called a gliding arc discharge (GAD), however because GAD did not usually have most of characteristics of normal arc discharge, about plasma part, we decided to call it with Serpentine plasma. The construction of our system was atmospheric pressure discharge system with 6 electrodes type, 6 phases commercial AC power supplies were used for. And three low-pressure mercury lamps were equipped with in a discharge tube. This lamp has three roles as a UV light source. One is an effect of discharge voltage drop by the photoelectric effect. Next is an ozone generation effect for a surface. Last one is a UV light irradiation effect to a surface. Using this compound plasma UV irradiation system, we applied green mold to various surface (nutrient medium, fruits, plastics, ceramics) and observed a characteristic change of the mold. As for the plasma irradiation, it was observed appearance at distance from the top of electrodes (5cm ~ 15cm) and irradiation time (3sec ~ 120sec), in all surface materials, a suppressant effect of the mold was confirmed.

Authors : Jaeseok Yoo, Sanghee Park, Kyoung-Youl Baek, Hoichang Yang
Affiliations : Department of Applied Organic Materials Engineering, Inha University, Incheon 402-751 (Korea), Center for Materials Architechturing, Korea Institute of Science and Technology, Seoul 136-794 (Korea)

Resume : Super-hydrophobicity of solid surfaces is the one of the unique surface properties required in many surface-related applications. In general, super-hydrophobic surfaces have been mostly produced in terms of the following two approaches: (1) the increase in the contact surface area and (2) the decrease in the contact surface energy. Here, we have investigated the surface hydrophobicity of nano-textured films containing either porous or pillar nanostructures with various aspect ratios. To fabricate these kinds of the nano-textured films, first, anodized aluminum oxides (AAOs) with regularly ordered pores, as nano-templates, were fabricated. Then, the textures of the AAO surfaces were changed from a columnar structure to a pillar one, via additional etching AAO walls with different times. Since the resulting AAO surfaces showed highly ordered nanostructures and a hydrophilic surface character, fluorinated self-assembled monolayers were chemically grafted to the AAO surfaces. Additionally, polymer films were manipulated by using molding with AAO nano-templates with a fixed columnar geometry: the polymer nano-textures could be controlled via changing molding pressure and detaching force. All the nano-textured surfaces were characterized by water contact angle, X-ray, and morphological analyses.

Authors : Astrid-Caroline Knall (1,2), David Reishofer (1), Manuel Hollauf (1), Sebastijan Kovacic (1,3) and Christian Slugovc (1)
Affiliations : (1) Institute for Chemistry and Technology of Materials, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria; (2) Department of Chemistry, Imperial College London, South Kensington Campus, Exhibition Road, SW7 2AZ, United Kingdom; (3) National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia

Resume : Inverse electron demand Diels-Alder (iEDDA) reactions between 1,2,4,5-tetrazines and alkenes have been applied for the synthesis of pyridazine-based ligands which were used as building blocks in metallopolymers or metal-organic frameworks. More recently, tetrazine-alkene iEDDA reactions were identified to fit the criteria for “click” chemistry reactions and therefore rapidly gained attention in molecular biology as a fast and versatile tool for bioorthogonal conjugation. In these works, mostly highly strained olefins such as trans-cyclooctenes or norbornenes and hydrolytically stable, yet less reactive, tetrazine species are used. However, less reactive dienophiles such as double bonds with a large degree of steric hindrance can be also addressed by using more reactive dienes or applying higher reaction temperatures so that the scope of iEDDA reactions can be extended to material modification. We performed iEDDA reactions with di(pyridyl)-1,2,4,5-tetrazine on the residual double bonds in the polymer backbone of emulsion-templated poly(dicyclopentadiene) (pDCPD) foams which resulted to be a high-yielding (2 mmol pyridazines or 8 mmol N/g), straightforward and versatile single-step method for their post-functionalisation with grafted di(pyridyl)pyridazine ligands bearing different functionalities. Furthermore, the coordination chemistry of these ligands as well as the influence of the performed modifications on mechanical properties have been investigated.

Authors : Jeong Hwan Kim, Sung Woong Lee, Jae-Sung Yoon, Doo-Sun Choi, and Yeong-Eun Yoo
Affiliations : Department of Nano Manufacturing Technology, Korea Institute of Machinery and Materials (KIMM), Daejeon 305-343, Republic of Korea

Resume : The single-file transport of microscopic particles, including ions and molecules, through nanofluidic channels has recently attracted much attention for applications of the sensing and manipulation of biomolecules. Tremendous engineering applications utilizing new physics of nanofludic channles have been reported and their basic fundamentals are actively researched mostly using computational simulation. Despite the development of advanced lithographic technology, the fabrication of nanochannel with sub-10nm scale is still challenging. This is why most research on nanofludic channel is conducted using computational simulation. The precise and repeatable control of the channel dimension (typically diameter) is difficult to be achieved at sub-10nm geometry. Moreover, the inner-surface functionalization of nanochannels which are necessarily followed for manipulation of charged particles is also difficult due to extremely tiny entrance of nanochannels. In this poster, I will present the fabrication of sub-10 nm nanochannels by using atomic layer deposition(ALD) with track-etched Polycarbonate membrane(d=~100nm) and AAO template(d=~20nm). The diameter of nanochannel was controlled precisely with self-limiting process of ALD. In addition, the inner-surface functionalization of nanochannels was also achieved by deposition of inorganic thin films(eg. TiO2,) and controlled peptide-surface modification, resulting in functional nanochannels based on organic/inorganic hybrid materials.

Authors : Abdullah Aljaafari
Affiliations : Physics Department King Fisal University

Resume : Zn-Al-AG nanohybrid was successfully prepared through urea hydrolysis. XRD pattern of Zn-Al-AG LDH showed new reflections at 2.1 nm, 1.1 nm and 0.7 nm indicating that Zn-Al-AG nanohybrid has been formed through host-guest interaction. These values confirmed that the dye Acid Green1 (AG1) is successfully intercalated inside the layered structure of Zn-Al LDH. Infrared spectrum and thermal analysis indicated that the Acid Green1 (AG1) anions have been intercalated into the interlayer galleries of the LDH. TEM images showed flat plate-like morphology for Zn-Al-AG nano-hybrid and the sheets are aggregated together because of the hydrophobic behavior of organic species. The prepared Zn-Al-AG nanohybrid used as fillers for preparation of polystyrene (PS) nanocomposite film using casting technique with different weight ratios ( 0.125, 0.250 and 0.50 wt% ). The mechanical properties of hybrid polymer nanocomposite films were investigated. The PS/ nanohybrids composite show significant improvement in mechanical properties of the matrix as compared to the neat polymer. The Zn-Al-AG nanohybrid act as a hardener agent for the neat polymer.

Authors : O. Aksimentyeva (1), V. Savchyn (2), I. Opaynych(1), P. Demchenko(1), Yu. Horbenko(1), V. Pankratov (3) and A.I. Popov (3,4)
Affiliations : (1) Dept. of Chemistry, Ivan Franko National University of Lviv, 79005, Lviv, Ukraine, (2) Dept of Electronics, Ivan Franko National University of Lviv, 79005, Lviv, Ukraine, (3) Institute of Solid State Physics, University of Latvia, LV-1063, Riga, Latvia; (4) Institute Laue-Langevin, F-38042 Grenoble, France;

Resume : The influence of polymer environment on luminescent properties of barium zirconate nanocrystals have been studied by means of cathodoluminescence (CL) spectroscopy technique. It was found that polystyrene (PS) shell around BaZrO3 nanocrystals significantly modify CL spectra. This phenomenon can be explained by chemical interaction between PS and BaZrO3 significantly changing the surface states of nanocrystals. This conclusion is confirmed by complementary experimental studies including X-ray diffraction, FTIR spectroscopy, Energy Dispersive X-ray analysis and scanning electron spectroscopy.

Authors : Katarzyna Grochowska, Gerard Sliwinski
Affiliations : Photophysics Department, The Szewalski Institute, Polish Academy of Sciences, 14 Fiszera St, 80-231 Gdansk, Poland

Resume : Recently, significant interest is observed in research on hybrid organic-inorganic nanomaterials for biomedical applications. Systems characterized by the unique optical properties of noble metal nanoparticles (NPs) in conjunction with DNA recognition capabilities are investigated. For highly sensitive detection of Hg ions and energy carriers (ATP) the DNA functionalized colloidal Au NPs are successfully demonstrated. In this work we report the design of the plasmonic effect for the case of DNA-based biomedical sensors supported on semi-regular Au nanoarrays. The NPs are produced by means of pulsed laser annealing of ultrathin Au films and reveal spherical shape and also broad size distributions. The characteristic plasmon resonances (PR) of peak positions and halfwidths dependent on the array geometries are strongly damped due to radiative, surface, bulk and interfacial terms. From the observed resonance peak positions below 2.3 eV the nearly constant nonradiative damping is deduced and changes in the PR band due to array geometry variations are assigned to radiative decay. The re-annealing of NP arrays causes almost double broadening and intensity increase of the resonance profile indicating on effective tuning in case of the hybrid DNA-Au nanoarray sensor.

Authors : A.I. Savchuk, I.D. Stolyarchuk, O.A. Savchuk, V.V. Makoviy, O.A. Shporta
Affiliations : Department of Physics of Semiconductors and Nanostructures, Chernivtsi National University, 2 Kotsubynsky Str., 58012 Chernivtsi, Ukraine

Resume : Inorganic-organic hybrid nanomaterials recently have received much attention due to their unique properties which are not observable for single components. In particular, diluted magnetic semiconductor (DMS) nanoparticles in combination with different organic polymers form a new family of hybrid materials. The matter is that doping of semiconductor nanoparticles with transition metals can add new functionality to the created nanocomposites. In this work, we report on preparation of hybrid CdS:Mn nanocrystals/organic polymer and results of their structural, optical and magneto-optical characterization. Synthesis has been performed using metal salt, sulfur powder and acrylamide monomer (AM) in ethylene glycol. Formation of CdS:Mn semiconductor nanoparticles and polymerization of the AM provided homogeneous distribution of the nanoparticles in polyacrylamide matrix. Transmission electron microscopy (TEM) analysis confirmed spherical shape and increase of average nanoparticle size with increasing of the growth temperature. The absorption spectra of the as-prepared nanocomposites showed blue shift of the exciton band as compared to its position for bulk CdS:Mn crystals. Results of magneto-optical Faraday rotation has indicated of incorporation of Mn component into nanoparticles. The observed small enhancement of the Faraday rotation in the hybrid DMS-based nanocomposites suggests of possible modification of spin exchange interaction between band carriers and magnetic ions.

Authors : Vijay Shankar Rangasamy 1*, Savitha Thayumanasundaram 1, Niels De Greef 2, Jin Won Seo 2, Jean-Pierre Locquet 1
Affiliations : (1) Department of physics and Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Heverlee, Belgium (2) Department of Metallurgy and Materials Engineering, Kasteelpark Arenberg 44, B-3001 Leuven, Belgium

Resume : Ionic liquids (ILs), with their inherent ion conductivity and negligible vapour pressure can be exploited in proton exchange membrane (PEM) fuel cells where thermal management is a major problem and the cell operation temperature is limited by the boiling point of water. In this work, sulfonated poly (ether ether ketone) (SPEEK) membranes were modified by the incorporation of tetrabutyl phosphonium bromide, [(C4H9)4P]+Br- by solvent-casting. Electrochemical impedance spectroscopy (EIS) was used to study the electrical properties of the modified membranes. Simultaneous thermogravimetry (TGA) and Fourier-transform infrared (FTIR) studies allowed evaluating the thermal stability of the modified membranes in terms of their water content. Nuclear magnetic resonance (NMR) technique was applied to study the changes in the chemical environment due to the interaction between the ionic liquid and the polymer. Mechanical properties were studied by Dynamic Mechanical Analysis (DMA). Microstructural changes were observed using scanning electron microscopy (SEM), which revealed increased pore size in the polymer matrix due to the large phosphonium cation. The ion exchange capacity (IEC) of the membranes was observed to increase on IL incorporation due to the low affinity of the hydrophobic phosphonium cation for the sulfonic acid group and hence the availability of more ion exchange sites per gram of the polymer. Keywords: SPEEK, phosphonium, ionic liquid, ion exchange capacity, TGA, FTIR

Authors : Savitha Thayumanasundaram 1* , Vijay Shankar Rangasamy 1, Niels De Greef 2, Jin Won Seo 2, Jean-Pierre Locquet 1
Affiliations : 1. Department of Physics and Astronomy, Celestijnenlaan 200D, B-3001 Leuven, Belgium. 2. Department of Metallurgy and Materials Engineering, Kasteelpark Arenberg 44, B-3001, Leuven, Belgium

Resume : In the present work, polymer blends based on Poly (vinyl alchol) (PVA) and Poly acrylic acid (PAA) was prepared with different molar ratios by solvent-casting technique. XRD spectra of the blends show that the degree of crystallinity of PVA starts to decrease with the addition of PAA due to the formation of interpenetrating polymer chain of PAA in PVA membranes. DMA analysis reveals that the storage modulus of 25mol% PAA sample is comparable to pure PVA membrane confirming the mechanical stability of the blend membranes. Tan delta vs. temperature plot of all the blend membranes shows two peaks, corresponding to α-relaxation (62-67°C) and β -relaxation (5-11°C) modes. 1H NMR spectra of pure PVA and PVA-PAA blend membranes shows all the peaks corresponding to OH (4-5ppm), CH (3.8ppm), DMSO (2.5ppm) as well as CH3 (2ppm) and CH2 (1.5ppm) of residual acetate group from hydrolyzed PVA. Significant changes in the peak area and the chemical shift of the PVA hydroxyl signal (4-5ppm) are observed when comparing to pure PVA spectrum revealing the strong intermolecular interactions (hydrogen bonding) between OH group of PVA and PAA. DSC curves of the blend membranes show single Tg indicating that the PVA/PAA blends are miscible in the full range of composition. The effect of doping lithium salt with various anions on the thermal, mechanical and electrochemical properties of these blend membranes are also discussed for its application in lithium ion batteries.Keywords: PVA, PAA, DMA

Authors : J. Bolley, M. Boucher, S. Meriaux; N. Pinna, L. Motte, Y. Lalatonne
Affiliations : a. CSPBAT (UMR7244), Université Paris 13 b. Neurospin, CEA c. Humboldt-Université, Berlin Institut de Chimie d. Hôpital Avicenne, Service de Médecine Nucléaire

Resume : Magnetic Resonance Imaging (MRI) is a very powerful technique for diagnostic in clinical medicine and biomedical research. One important challenge for this scope is the development of targeted magnetic probes capable of achieving a high specificity and sensitivity by in vivo. To achieve these goals, USPIO (Ultra Small Particle Iron Oxide) have been produced from 2 to 12 nm and the particle surface has been functionalized with PEG and c-RGD peptides in order to demonstrate the specificity to αvβ3 integrins associated with a wide range of cancers. For controlling the nanoparticles size, we adapted the Pinna and Niederberger et al. method under microwave treatment. The synthesis is carried out using benzyl alcohol, which acts as a reagent and growth controlling agent particles. This compound occurs naturally in many plants and foods and is used as a food additive or preservative for pharmaceutical or cosmetic products. Herein it appears as a compound of choice in the context of the synthesis of nanoparticles for biological applications. We observe that the MRI contrast is very dependent on the nanoparticles size. Herein the extremely small nanoparticles (< 4nm) are positive T1 MRI contrast agent whereas larger particles exhibit a very strong T2 contrast. The in-vivo experiments have been performed on brain mice using a 7T MRI. These new synthesized nanoplatforms demonstrated a very good contrasting efficiency and allows a strong enhancement of the brain vasculature.

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SESSION Q.8 : Fiona Meldrum
Authors : Bruno BUJOLI
Affiliations : CEISAM, UMR 6230 Université de Nantes-CNRS, 2 Rue de la Houssinière, BP 92208, 44322 Nantes Cedex 03, France

Resume : While research at the frontier between Chemistry and Biology is of major importance for the design of new drugs, there is also high potential for developing novel materials for biotechnologies. In this context, we will describe how phosphonic acid-mediated modification of inorganic surfaces can be applied to the synthesis of biomaterials. The integration of drugs and devices is a growing force in the medical industry. In this context, a new calcium phosphate cement-based (CPC) medical device will be presented, capable of providing mechanical reinforcement and delivering a bisphosphonate (BP) anti-osteoporotic drug locally. The main properties of the biomaterial are not significantly affected, in terms of injectability and setting time, provided that the BP is chemisorbed as a monolayer onto calcium deficient apatite, one component of the cement. This route allows controlling the drug release under simulated in vivo conditions, and very promising pre-clinical investigation of the cement properties showed the ability of the Alendronate-loaded cement to resorb while promoting new bone formation. In a second example, a new concept for the preparation of artificial antibody microarrays will be described, in which proteic scaffolds are covalently bound to a zirconium phosphonate monolayer through an inorganic linkage, thus allowing controlled orientation of the immobilized probes and highly sensitive detection of antigen targets.

Authors : Matteo Di Giosia, Matteo Calvaresi, Giuseppe Falini
Affiliations : Dipartimento di Chimica “G. Ciamician”, Alma Mater Studiorum Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy

Resume : Calcium carbonate (CaCO3) crystals show wide perspectives as smart carriers for drugs due to their capability to adsorb, and more importantly to entrap, molecules. Moreover, CaCO3 is a biocompatible and biodegradable material, which preparation is easy, low cost, organic solvent-free and the size of the CaCO3 particles can be easily controlled. CaCO3 solubility is pH-sensitive and the use of CaCO3 crystals entrapping molecules allows their release only where the dissolution of crystal occurs. This carrier is particularly suitable for the selective release of drugs in tissues that are more acidic than normal physiological pH (tumors, inflamed tissues). The feasibility of such a system for anticancer therapy was tested in vitro by releasing the drug doxorubicin (DOX), an anthracycline widely used in chemotherapy, from calcite/DOX hybrid crystals. In addition doped calcite hybrid crystals can be used to store efficiently unstable drugs. Minocycline, an anti-inflammatory drug sensitive to light, heat and pH, was incorporated in calcite crystals and its chemical properties remained unchanged for months. In regenerative medicine molecule-doped calcite crystals can be used to create active scaffolds. CaCO3 crystals entrapping retinoic acid (a differentiating agent) were synthesized. In vitro tests demonstrated that the controlled release of retinoic acid via crystal dissolution allowed the differentiation of stem cells into astrocytes.

Authors : C. Battocchio[1], F. Porcaro[1], G. Iucci[1], M. Dettin[2], A. Zamuner[2], G. Polzonetti[1]
Affiliations : [1]Department of Sciences, University “Roma Tre”, Roma, 00146, Italy. [2]Department of Industrial Engineering, University of Padova, Padova, 35131, Italy.

Resume : The hydrogels of self-assembling ionic complementary peptides have collected in the scientific community increasingly consensus as mimetics of the extracellular matrix that can offer 3D supports for cell growth or be vehicles for the delivery of stem cells or drugs. Such scaffolds have also been proposed as bone substitutes for small defects as they promote beneficial effects on human osteoblasts. In this context, our research deals with the introduction of a layer of self-assembling peptides on a TiO2 surface, whose surface has been previously sandblasted and acid-etched. The layer of the peptide was anchored to the metal oxyde by covalent functionalization with self-assembling sequences. Enrichments of peptide layer has been also proposed with the growth factor IGF- 1, incorporated into the layer, and / or with a conjugate obtained by chemoselective ligation between a self- assembling peptide and a sequence of 25 residues containing 4 GRGDSP motifs per chain. In this work, we present an accurate spectroscopic investigation of the proposed biocompatible system carried out by state-of-the-art synchrotron radiation methodologies: high resolution XPS and angular dependent NEXAFS. HR-XPS studies confirmed the change in the surface composition in agreement with the proposed enrichments, and lead to assess the self-assembling peptide chemical stability. NEXAFS spectra collected in angular dependent mode at the C K-edge allowed to investigate the self-assembling behavior of the macromolecules, as well as to determine their molecular orientation on the substrate.

Authors : Laura González1, Elisa Carenza1, Anna Roig1, Anna Laromaine1*
Affiliations : Group of Nanoparticles and Nanocomposites. Institut de Ciència de Materials de Barcelona, ICMAB (CSIC). Campus UAB, 08193 Bellaterra, Spain.

Resume : Caenorhabditis elegans (C. elegans) is a 1-mm long free-living soil nematode widely used in biomedicine as a model organism. Its key attributes as an experimental system, including its simplicity, transparency, short life cycle, sequenced genome and small body size, together with the ease of cultivation in the lab, make C. elegans a promising animal model to evaluate nanoparticles in vivo. Our objective is to use C. elegans in the primary screening of nanoparticles with biomedical applications within the manufacturing lab, in order to validate their use, to optimize their design, and to study their toxicity. In the present work, we assessed the stability of the iron oxide nanoparticles (SPIONs) in the C. elegans media by Dynamic Light Scattering. The interaction between SPIONs and C. elegans was evaluated by magnetometry, from which we quantified the iron content of worms treated with different concentrations of SPIONs for 24 hours and evaluated the morphology of SPIONs after this time and excreted SPIONs. The localization of SPIONs within the body of the worm was evaluated using Perls’ Prussian blue staining.

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Authors : Marilisa Vigolo[a], Mauro Carraro[a], Antonio Sorarù[a], Silvia Borsacchi[c], Marco Geppi[c], Silvia Gross[a,b]*
Affiliations : a)Dipartimento di Scienze Chimiche, Università degli Studi di Padova, via Marzolo, 1, I-35131, Padova, Italy b)Istituto per l’Energetica e le Interfasi, IENI-CNR and INSTM, UdR, via Marzolo, 1, I-35131, Padova, Italy c) Dipartimento di Chimica e Chimica Industriale Università di Pisa v. Risorgimento 35 56126 PISA (Italy)

Resume : The idea of protect a catalytically active system by embedding it in/anchoring it on it a matrix is the underlying and widely used concept in heterogeneous catalysis. The use of hybrid materials to “heterogenize” catalysts, in particular by the embedding of the catalyst into a polymer matrix, is a fertile field of research. Recently, we have evidenced the possibility to use zirconium-based oxoclusters to activate hydrogen peroxide, for the oxidation of organic substrates. The oxidation of methyl p-tolylsulfide to the corresponding sulfoxide and sulfone was chosen as model reaction, showing an interesting selectivity towards the oxidation of the sulfoxide. Now, we have embedded Zr and Hf oxoclusters into PMMA matrix and proved their effectiveness towards the oxydesulfurization of a model fuel. To this aim, we have exploited such reactivity to perform the oxidation of dibenzothiophene (DBT) to the corresponding sulfoxide (DBTO) and sulfone (DBTO2). Up to 90% yield for DBT conversion was obtained in 24 h, with a 85% selectivity for DBTO2. In most cases, thanks to the enhanced affinity of the polymeric matrix toward polar substrates and solvents, the heterogeneous set-up have shown to be more efficient than the corresponding homogeneous systems, and has allowed the recovery and recycling of the catalytic species. FT-IR, SS-NMR and XAS showed good stability of the hybrids under catalytic conditions. [1] Wight et al. Chem. Rev 2002, 102, 3589 [2] Gross, S. J. Mater. Chem. 2011, 21, 15853

Authors : Clemence Queffelec,a Emmanuel Chailleux,b Mariane Audo,b Maria Paraschiv,c Jack Legrand,c Olivier Lepine,d Bruno Bujoli,a
Affiliations : a Chimie et Interdisciplinarite : Synthese, Analyse, Modelisation (CEISAM) 2 Rue de la Houssiniere, BP 92208,44322 Nantes Cedex 03, FRANCE b Institut Français des Sciences et Technologies du Transport, de l'Amenagement et des Reseaux (IFSTTAR) Route de Bouaye, 44340 Bouguenais, FRANCE c Genie des Procedes & Environnement &Agroalimentaire (GEPEA), 58, rue Michel Ange BP 420 44606 Saint Nazaire, France d Alpha Biotech, Le frostidie, 44410 Asse, FRANCE

Resume : Asphalt is a sticky viscoelastic petroleum industry by-product, used mostly as aggregates binder in road pavement. Lately, refining strategies are changing and high molecular fractions can be cracked into lighter fuel fractions leading to difficulties in answering the worldwide needs in asphalt. To avoid this problem, some biomass-based binders have been developed. The weak point of those alternative binders is that edible oil is used. Therefore, it has been decided to investigate the potential of microalgae, which do not compete with human feeding. Microalgae are already studied for bioenergy, or animal feeding. For economic and ecological reasons, the by-products resulting from those industries will have to be valorized. Consequently, we propose to study the potential of those by-products as binder for aggregates. Two processes have been studied. First, organic solvents extractions have been performed as an exploratory study. The oil extracted has been characterized from a chemical and a mechanical point of view showing an interesting asphalt-like behaviour. Nevertheless, to reach an economic viability, all fractions of the microalgae need to be valorized. The second study focused on a new promising solvent-free method: the hydrothermal liquefaction. This process allowed recovering around 54 wt.% of a hydrophobic material. By tuning the hydrothermal conditions the bio-crude rheological behavior can be controlled, to reach the one of petroleum bitumen.

Authors : Rabindranath Jana*, Keka Rana, Arijit Bhattacharya, Dedajyoti Naskar, Saptarshi Chatterjee
Affiliations : Department of Chemical Engineering, Haldia Institute of Technology, ICARE Complex, Haldia-721657, Purba Medinipur, W.B., INDIA

Resume : Polymer-based thin films have become more attractive for their advantages of low cost, light weight and easy processability, instead of their limited exciton diffusion length, low electrical conductivity, low charge-carrier mobility, narrow absorption spectrum and low chemical and thermal stability. In our present study we have chosen poly(9-vinylcarbazole) (PVK), a π-conjugated polymer, as an active polymeric material because it is being used as one of the most popular OPV materials during last decade. We report the charge carrier photogeneration of PVK with different weight proportions (0~25 wt%) of a hybride material, consisting of phenethylammonium (PEA)/Vanadium phosphate, using IR, UV-Vis, and energy dispersive spectroscopy (EDS), thermogravimetric analysis (TGA), steady state photocurrent (SSPC) measurement, and atomic force microscopy (AFM). The SSPC measurements showed that the photocurrent of PVK was reduced by approximately three orders of magnitude by the incorporation of a small amount (~12 wt%) of the hybride material, suggesting that hole transport occurred through the PVK carbazole groups, whereas a reverse trend was observed at high proportions (>12 wt%) of hybride materials, suggesting that transport occurred via hydride molecules. The transition to a trap-controlled hopping mechanism was explained by the difference in ionization potential and electron affinity of the two compounds as well as the formation of charge percolation threshold pathways.

Affiliations : Photovoltaic Laboratory, Research and Technology Centre of Energy, BP 95, Borj-Cedria Science and Technology Park, BP 95, 2050 Hammam-Lif

Resume : In this work, we study the evolution of amino group functionalization on porous silicon (PS) by using Fourier Transform infrared spectroscopy (FTIR). Amino-terminated organic layers are deposited on silicon (Si) wafers and incorporated on PS by assembling 3-aminopropyltriethoxylane (APTES) in freshly prepared hydrolysis solution. FTIR spectra of APTES-Si present absorption bands associated to -NH2, -CH2 and -SiO molecules arrangements. FTIR spectrum of APTES-PS presents in addition to the absorption bands associated to APTES presence, absorption peaks associated to SiHx compound between 2000 cm-1 and 2300 cm-1 spectral range. PS layers are initially covered by silicon hydrogen species. By varying the immersion time of PS samples in hydrolyzed APTES solution, the intensity of Si-SiHx absorption bands decreases with the apparition of O-Si-H features. After adequate time, all Si-H absorption bands disappear indicating a total functionalization of PS layer.

Authors : Massimiliano D’Arienzo, Barbara di Credico, Matteo Redaelli, Roberto Scotti, Franca Morazzoni
Affiliations : University of Milano-Bicocca, Dept. of Materials Science, Via R. Cozzi 55, 20125, Milano

Resume : Reports on soft-chemistry hybrid techniques have shown great success in controlling the size and the morphology of oxide nanocrystals used as active materials for gas-sensing devices. In this context, SnO2, ZnO and WO3 nanocrystals with specific exposed surfaces were prepared by colloidal synthesis assisted by capping agents (oleic acid, oleylamine, tetramethylammonium hydroxide) which selectively adsorb on the different surfaces of the crystal, guiding the growth process and allowing to modulate the final shape. In order to suggest a rationale for the relative importance of the crystal faces in the sensing mechanism, the sensing behavior of the nanocrystals toward CO or NH3 was examined and the obtained performances were discussed in connection with the paramagnetic oxygen defects (VO• centers) detected by ESR or with the surface nitrogen species revealed by XPS. Results support the idea that the presence of specific surfaces in SnO2 and ZnO nanocrystals tune the generation of the VO• centers driving their sensing performance toward CO. For WO3, it turned out that definite surfaces represent privileged reactive sites for the NH3 oxidation and therefore are essential for enhancing the sensing properties. These outcomes may help to a more effective evaluation of the involvement of the crystal surfaces in the sensing mechanism and may shed some light on how colloidal hybrid methods can be better applied to design more efficient gas sensors.

Authors : I Shupik,1,2 L Vauriot,1,2 JP Delville,2 MH Delville,1 *
Affiliations : 1 CNRS/ICMCB, Universit? de Bordeaux France; 2 LOMA Universit? de Bordeaux, France * e-mail:

Resume : During the last decade, there has been a tremendous interest in Janus particles with more than 1500 papers on this concept dealing with synthesis, production yield, and more recently functionalisation, self-assembly and applications. However, when carefully looking at these reports, it appears that they mainly concern associations between two polymers, a polymer and metal or metal oxide, and a metal with a dielectric metal oxide. Samples based on metal/semiconductors are scarce. Additionally, most of these methods of production are time consuming on the one hand and produce rather low quantities of particles on the other hand, as stressed by their authors. It is seems crucial to implement a technique which circumvent these drawbacks and setup a simple device which allows a facile production of significant amount of Janus nanoparticles. In this context, we present a general and flexible optofluidics strategy in lab-on-chip. The concept consists in activating the band gap of flowing semiconductor nanoparticles by a Laser to generate electron-hole pairs and use electrons to photoactivate the redox transformation of an active ion present in the flowing solution. Nano TiO2 is an oxide of choice due to its extended use, high stability, low cost, and UV activity. Controlled synthesis of TiO2 nanoobjects with various morphologies will be detailed as well as their laser dissymetrisation by metals (Ag, Au) when varying the different parameters of photodeposition in the microchannel:

Authors : In Hyuk Son1, Junyoung Mun2, Jong Hwan Park1, Jin-Hwan Park1 and Jae-Man Choi1
Affiliations : Energy Lab., Material R&D Center, Samsung Advanced Institute of Technology (SAIT), Samsung Electronics Co. LTD. Maetan 2-dong, Yeongtong-gu, Suwon-si, Gyeonggi-do, 443-803, Republic of Korea; 2 Department of Energy and Chemical Engineering, Incheon National university, Songdo-dong, Yeonsu-gu, incheon, 406-840, Republic of Korea

Resume : Over-lithiated layered oxide (OLO) (Li1.18Ni0.17Co0.1Mn0.56O2) has attracted a lot of interests as a cathode material in high energy density lithium ion batteries for hybrid vehicle and smart grid energy storage systems due to its prominent energy density over 250 mAh g-1. However, the problem of increasing resistance, which is originated from their structural deformations and oxygen evolutions owing to participation of Li2MnO3 to de-lithiation process, restricts wide applications of OLO. We have investigated an innovative hybrid organic-inorganic energy storages material that is surface modification with organic functionality on OLO to improve the cycleability and rate capabilities of OLO, by gas-phase catalytic reaction. This is a simple process and can be easily scalable. Detail surface analyses support that the formation of carbonaceous-coatings on OLO surface without any chemical or physical breakdowns of the oxide cathode structure is achieved. These improvements have great potential since the methodology is compatible with other cathode materials and it will not deteriorate their original crystal structure. The microstructures of the prepared samples are investigated by X-ray diffraction method and secondary electron microscope. Furthermore, the surface modified samples with that 0.1wt.% of carbon in the electrode material confirmed by thermal gravity analysis, is found to exhibit higher conductivity, rate capability and specific discharge capacity than the pristine samples, which are attributed to the suppression of contact resistance and the fast charge transfer reactions as confirmed by EIS analyses.

Authors : M.D’Arienzo a, B. Di Credico a, T.Hanel b, F.Morazzoni a, R.Scotti a, A. Susanna a, L.Tadiello a,
Affiliations : a Dip. Scienze dei Materiali, INSTM, Univ.of Milano-Bicocca, Via R. Cozzi, 53, 20125 Milano, Italy; b Pirelli Tyre SpA, Viale Sarca, 222, 20126 Milano, Italy.

Resume : SiO2 fillers are commonly used to enhance the rubber mechanical properties. The efficacy depends on size, shape and surface of SiO2 particles which affect the interaction of the filler with rubber. The knowledge of the organic/inorganic interface plays a key role in the control of this interaction; nevertheless its study still remains an open challenge both from the industrial and fundamental points of view. In order to deepen this issue, the work focused on the sol-gel synthesis of SiO2 nanofillers by novel in-situ aqueous and non-aqueous routes and by ex-situ method assisted by capping agents. SiO2 nanoparticles different in size, shape and surface functionalization were designed and synthesized: a) with different isotropic/anisotropic shapes (spherical, rod-like) and aspect ratios (AR) ranging from 1 to 10; b) with different surface functional groups, able to chemically or physically interact with the rubber. TEM and dynamic-mechanical analyses assessed that surface groups interacting with rubber promote the filler homogeneous distribution. The reinforcing effect is related to the formation of a percolative network of SiO2 nanoparticles connected by thin rubber films. Stronger reinforcement is provided by high AR particles due to their self-alignment and the consequent larger filler/polymer interface compared to spherical ones. The study confirmed that beyond maximizing the particle dispersion, morphology control is mandatory to obtain the desired mechanical properties.

Authors : Daniel M. Packwood, Susumu Shiraki, Taro Hitosugi
Affiliations : WPI-Advanced Institute for Materials Research (WPI-AIMR), Tohoku University

Resume : A well-known problem in pulsed laser deposition (PLD) of thin films from lithium-containing metal oxide targets is that the film often contains reduced Li content compared to the target surface. These experiments are usually carried out in the presence of an oxygen background gas. We analyse the PLD process with an analytic model of a plume gas P expanding into a background gas Q. The time-evolution of P is governed by elastic collisions between the particles of P and Q. The model predicts a reduction in Li content of the thin film compared to the target surface, due to the strong scattering of the light Li atom compared to the weak scattering of the heavy Mn atom by the oxygen gas. The predictions are in quantitative agreement with compositions of real thin films formed by pulsed laser deposition of lithium manganese oxide targets in our laboratory. These results show that there will be inevitable loss of cations when forming thin filmed by PLD on targets containing both light and heavy cations. The target composition must therefore be carefully chosen to obtain high quality thin films with a desired stoichiometry. Reference: D. M. Packwood, S. Shiraki, and T. Hitosugi. Phys. Rev. Lett. 111, 2013, 036101.

Authors : Muling Zeng, Anna Roig, Anna Laromaine
Affiliations : Institut Ciencia de Materials de Barcelona, Campus UAB, 08193 Bellaterra, Spain.

Resume : Cellulose from microbial origin, commonly known as bacterial cellulose (BC), is becoming a commodity material since it incorporates desirable structural properties for biomedical applications. Here, we present the production and characterization of bacterial cellulose (BC) films of less than a hundred microns thick produced by Glucoacetobacter bacteria. These thin films are processed using three different drying methods: 1) room temperature, 2) freeze drying and 3) supercritical drying. The different processes confer to the cellulose films a hierarchical porous network, high purity and crystallinity, flexibility and strength (high Young modulus at room and elevated temperatures) and large water holding capacity that can be tailored and controlled for different applications. In this work, we used BC films as platform to incorporate magnetic functionality by the incorporation of iron oxide nanoparticles. Using the microwave-assisted method in a rapid and cost effectively manner, we magnetically coated the whole structure of our BC films. Evaluation of different precursor´s concentrations and taking advantage of the different drying methods we achieved magnetic bacterial films with different magnetic strength. We obtained magnetic BC composites flexible, robust and with high magnetization within few minutes in a clean, easy and reproducible method. In the talk, we would illustrate the synthesis and characterization of the magnetic BC films as well as the flexible and magnetic properties achieved.

Authors : Pierre Farger,1 Guillaume Rogez,1 Emilie Delahaye,1 Pierre Rabu1
Affiliations : 1 Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 and NIE, 23 rue du Loess, BP 43, 67034 Strasbourg Cedex 2

Resume : The interest for the synthesis of MOFs ever growths due to their high versatility and potential applications in catalysis, treatment and storage of gas, drug delivery…1-3 MOF are usually obtained by solvothermal synthesis. In our group, we have focused on the synthesis of these compounds by solvo-ionothermal approach, involving tailor-made ionic liquids (ILs) bearing specific coordination functions. Contrary to the literature, where ILs acts only as solvent or template,4, 5 our approach should allow a crystal engineering of these compounds. We will present our recent results concerning the synthesis, structure and characterization of novel transition metal based compounds. Beyond the interest to explore new methods of synthesis and new families of compounds, the incorporation of ILs into the hybrid coordination networks let glimpse the possibility to obtain multiferroic materials.6, 7 1. G. Férey, Chem. Soc. Rev. 37, 2008, 191. 2. P. Horcajada, C. Serre, M. Vallet-Regí, M. Sebban, F. Taulelle, G. Férey, Angew. Chem. Int. Ed. 45, 2006, 5974. 3. M. Dincă, J. R. Long, Angew. Chem. Int. Ed. 47, 2008, 6766. 4. P. J. Calderone, P. M. Forster, L. A. Borkowski, S. J. Teat, M. Feygenson, M. C. Aronson, J. B. Parise, Inorg. Chem . 50, 2011, 2159. 5. W. J. Ji, Q. G. Zhai, S. N. Li, Y. C. Jiang, M. C. Hu, Chem. Commun. 47, 2011, 3834. 6. Z. Lin, A. M. Z. Slawin, R. E. Morris, J. Am. Chem. Soc. 129, 2007, 4880. 7. L. Xu, S. Yan, E. Y. Choi, J. Y. Lee, Y. U. Kwon, Chem. Commun. 2009, 3431.

Authors : Yueli Liu, Yuqing Cheng, Zhuoyin Peng, Keqiang Chen, Wen Chen*
Affiliations : State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, and School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, P. R. China

Resume : Photocatalytic performance of TiO2 nanomaterials has attracted a lot of attentions by designing and modifying various TiO2-based composites. In recent years, graphene-TiO2 hybrid nanomaterials have been widely researched due to the perfect property of the graphene [1], as graphene between the hybrid nanomaterials can lengthen the life-time of photoexcited charge carriers to improve the photoactivity [2]. Therefore, the interface combination between the graphene and TiO2 nanomaterials is quite important for the understanding of the enhancement of their photocatalytic performance. In the present work, we propose a process for synthesizing graphene-TiO2 nanoparticles by a simple solvothermal method, and then the composite materials are used as photocatalysts for degradation of methyl violet, which is expected to obviously enhance the photocatalytic performance comparing with that of the pure TiO2 nanoparticles. SEM and TEM images show that the TiO2 nanoparticles with diameters of 20-30 nm tightly attach on the surface of the graphene sheets. The interface combination of chemical states between the TiO2 nanoparticles and graphene is charactered by Raman mapping spectra, as Raman mapping method is a novel method to provide the distribution information of the composites, and it is found that the uniform dispersion of the graphene in the composites will greatly influence their photocatalytic performance. References: [1]Pan X, Zhao Y, Liu S, et al. ACS Appl. Mater. Interf., 2012, 4: 3944. [2] Zhang Y, Zhang N, Tang Z R, et al. Phys. Chem. Chem. Phys., 2012, 14: 9167.

Authors : Claudio Melis*, Luciano Colombo**, Francesca Borghi**, Alessandro Podestà**, Cristian Ghisleri**,Paolo Milani**, Luca Ravagnan***
Affiliations : *Dipartimento di Fisica, Università di Cagliari **CIMAINA and Dipartimento di Fisica, Università di Milano ***WISE srl

Resume : Poly(dimethylsiloxane) (PDMS) is the most popular elastomeric material since it couples biocompatibility with excellent elastic properties. For this reason considerable efforts are currently being concentrated on the fabrication of stretchable metallic circuits and microelectrodes integrated on PDMS. Recently it has been demonstrated that neutral metallic nanoparticles produced in the gas phase and aerodynamically accelerated in a supersonic expansion can be implanted in PDMS substrate to form a conductive nanocomposite (nc) with novel functional properties[C. Ghisleri et al., J. Phys. D: Appl. Phys 47,015301 (2014)]. While the effectiveness of this novel technique has been already demonstrated few information are available at the moment on the ncs elastic properties. In particular it is of great importance to characterize the nc elastic properties as a function of the implanted cluster concentration. To this aim we use classical viscoelasticity theory in combination with classical molecular dynamics simulations to estimate the nc Young modulus as a function of the implanted clusters concentration. The results show that the nanocomposite Young modulus is basically unchanged (with respect to pristine PDMS) up to a cluster concentration of 25%; while above 25 % we observe a Young modulus exponential increase.

Authors : Hyoung-Mi Kim1, Kitae Ryu2, Sung Hoon Kim3, Yoon Suk Kim3 Tae-il Kim2* and Jae-Min Oh1*
Affiliations : 1 Department of Chemistry and Medical Chemistry, College of Science and Technology, Yonsei University, Wonju, Gangwondo 220-710, South Korea; 2Department of Biosystems and Biomaterials Science and Engineering, College of Agriculture and Life Sciences, Seoul National University Seoul 151-921 Korea; 3 Department of biomedical laboratory science, College of Health Sciences, Yonsei University, Wonju, Gangwondo 220-710, South Korea

Resume : We have prepared surface charge controlled graphene oxide (GO) nanomaterials by two methods; modified Hummer?s method and post synthetic treatment with amine moiety on GO. In order to control the degree of oxidation, graphite was reacted with various graphite/hydrogen peroxide ratio of 1, 2 and 4, which resulted in the zeta potential -22, -27, and -32 mV, respectively. Then the GO having -27 mV of zeta potential was reacted with either ammonia or aliphatic diamine. The zeta potential of amine modified GO was determined -19, 2 and 9.1 mV for ammonia, 1,3-diaminopropane and 1,6-diaminohexane modified GO. The X-ray photoelectron and fourrier-transform infrared spectroscopy showed the successful formation of C-O and C-N bonds in the prepared samples. In order to evaluate the cellular interaction of GO nanomaterials depending on their surface charge, we carried out hemolysis assay utilizing human whole blood as well as cellular experiments on human cervical cancer HeLa and lung carcinoma A549 cell culture lines. Hemolysis assay revealed that the GO nanomaterials became hematocompatible with increasing positive surface charge. Cellular toxicity experiments also showed lower cytotoxicity on GO having more positive surface charge. In order to quantify the cellular uptake of GO, we attached fluorescein isothiocyanate on amine-modified GO. It was shown that GO with positive surface charge could be internalized more efficiently into cells compared to the negatively charged ones.

Authors : Gaulthier Rydzek (a b) , Katsuhiko Ariga (a)
Affiliations : (a) World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS); (b) Japan Society for the Promotion of Science (JSPS), Japan

Resume : The tremendous development of LbL coatings is largely due to both their exceptional tolerance to substrate’s nature and topology, and to the very wide library of materials that can be incorporated into the multilayer. However, the sequential deposition process and the weak stability of the obtained films has recently lead some groups to develop other options, yet less functionalizable, such as simultaneous spraying [1], morphogen-driven [2] or continuous assembly [3] approaches. The work presented here opens new perspectives to one-pot self-constructing films by providing the resulting surface platform an access to the wide library of alkyne-azide “click” chemistry compounds and to the unique morphologic properties of electropolymerized a poly(aniline). The Simultaneous Electropolymerization and Electro-Click Functionalization process (SEEC) has been introduced for one pot self-construction of functional polymer films where both polymerization and functionalization are triggered by electrochemistry. As a proof of concept, 4-azido-aniline and ethynylferrocene have been used and studied by CV, XPS, UV, AFM and SEM. A large number of experimental parameters allow to access three main tuning levers and to potentially design platforms for sensors, membranes, fuel cells, supercapacitors, photovoltaics, or smart and stimuli-responsive coatings

Authors : Rui F. P. Pereira [1,2], Maria M. Silva [1], Verónica de Zea Bermudez [2,3]
Affiliations : [1] Department of Chemistry, University of Minho, 4710-057 Braga, Portugal; [2] Department of Chemistry, University of Trás-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal; [3] CQ-VR, University of Trás-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal

Resume : The preparation of novel functional materials inspired from natural materials is attracting considerable interest in the scientific community. The development of environmentally friendly functional composites is promoting the usage of renewable resources. Among various types of renewable resources, proteins and natural polysaccharides shown a wide range of applications in textiles or in the biomedical area. Silk fibroin is a commonly available natural biopolymer produced in specialized glands of arthropods, with a long history of use in textile production and also in health cares. Nowadays, silk fibroin is increasingly explored in other areas and can be find in a higher morphological diversification of silk biomaterials like films, electrospun fibers, 3D porous scaffolds or nanoparticles. New applications such as their use in active components in optical devices, open the way towards the development of multifunctional optoelectronic devices, which in perspective can be made fully biocompatible and eventually bioresorbable. Moreover, fibroin can be added to other biocomponents in order to modify the biomaterial properties leading to optimized and total different functions. The tuning and completely understanding of silk fibers physicochemical properties and interaction with other elements are of crucial importance for the improvement of already existent silk-based materials and the basis for the development of new products.

Authors : Luman Zhang1, Niels De Greef1, Jean-Pierre Locquet2 and Jin Won Seo1
Affiliations : 1 Department of Materials Engineering, KU Leuven, 3001 Leuven, Belgium 2 Laboratory of Solid State Physics and Magnetism, KU Leuven, 3001 Leuven, Belgium

Resume : Carbon nanotubes’ (CNTs) excellent mechanical properties make CNTs extremely interesting for the use in composites. Hybrid composites can be obtained by growing CNTs onto fibers. The presence of CNTs can strongly influence the fibre/matrix interface. However, how CNTs exactly behave in composites and affect the damage behaviour remain unclear. In this work, CNTs were grown on carbon fibers (CFs) by chemical vapor deposition (CVD). By using the oxidative dehydrogenation reaction of C2H2-CO2, we were able to produce CFs/CNTs hybrid materials without damaging the CFs surface. Uni-directional (UD) nano-engineered CFs reinforced composites (nFRCs) were fabricated using these materials. The fracture surface of the composites was studied parallel to the fibers. The in-situ transverse 3-point bending tests were performed on composites with and without CNTs. In the latter case, small cracks first appeared in the vicinity of defects. Reaching the critical strain, cracks started to develop at the notch tip as a result of fiber-matrix debonding. The crack propagation was discontinuous and originated from a number of debonded interfaces. In the case of nFRCs, the crack propagation sequence was similar. However, the matrix failure around fibers as well as CNTs bridging cracks have been observed. Especially the latter feature has never appeared in the composite without CNTs. These results indicate that the presence of CNTs in nFRCs can affect the damage initiation as well as propagation.

Authors : C. Tudisco1*,M. T. Cambria1, F. Sinatra2, V. Oliveri, 1 G. Vecchio, 1E. Fantechi,3 C. Sangregorio3,4, G. G. Condorelli1
Affiliations : 1 Dipartimento di Scienze Chimiche, Università di Catania and INSTM UdR di Catania, v.le A. Doria 6, 95125 Catania, Italy, 2 Dipartimento “G. F. Ingrassia”, Università di Catania, Via S.Sofia 87, 95100 Catania, Italy, 3Dipartimento di Chimica “U. Schiff”, Università di Firenze and INSTM UdR, via della Lastruccia 3, Sesto Fiorentino,50019 Firenze,Italy 4CNR – ISTM, via C. Golgi 19, 20133 Milano, Italy

Resume : Functionalized magnetic iron oxide nanoparticles (MNPs) are promising tools for advanced medical applications such as MRI, hyperthermia, drug delivery, etc. In most of their potential applications, the hybrid organic/inorganic nature of the MNPs surface plays a pivotal role in determining their properties. In this contribution, the anchoring process of multifunctional layers is based on MNPs pre-functionalization with the bifunctional linker (3-aminopropyl) phosphonic acid. Various functional molecules have been then bonded to the amino group of the phosphonic monolayer through a multistep approach. In the first step, a beta-cyclodextrin, able to load hydrophobic drugs, was conjugated to the pre-functionalized MNPs. Then polyethylene glycol, folic acid and a rhodamine probe were bonded through activated carboxylic moieties to the remaining amino groups of the monolayer to improve colloidal stability and to impart targeting and fluorescence properties to the nanoconstruct. The validation of each synthetic step was obtained by X-ray photoelectron and FTIR spectroscopies. The ability of the proposed multistep synthetic route for the preparation of efficient multifunctional systems was proved through the evaluation of the functional properties of the organic coated magnetic nanoparticles, such as hyperthermic efficiency, drug loading, colloidal stability, biocompatibility and fluorescence.

Authors : J. Puigmartí-Luis, M. Paradinas, R. Rodriguez, R. Pfattner, D. Amabilino, C. Ocal
Affiliations : Institut de Ciència de Materials de Barcelona-CSIC Campus UAB, 08193 Bellaterra (Spain)

Resume : The synthesis of ordered molecular materials on insulating crystals is of great interest for molecular electronics since distinct and novel properties can originate at crystal interfaces. Unfortunately, the number of techniques used for single organic-based interface formation is very limited and show low reproducibility. We present an effective microfluidic strategy for growing molecular-based hetero-interfaces at desired locations. Microfluidic pneumatic clamps embedded in a double layer platform provide a facile and reliable technology for crystal trapping and interface formation. Using this approach we introduce a reducing agent (Ag content) into a trapped in-situ grown TCNQ insulating crystal that reacts leading to AgTCNQ. The Ag diffusion can be stopped guarantying the intimate contact between materials needed to investigate the TCNQ/AgTCNQ interface formation and the electrical properties of the boundary structure as the molecule is reduced. In order to gain information about the structural and electronic properties of the system a combination of Atomic Force Microscopy techniques were employed. Morphological characterization of the interface shows the formation of different regions of reduced material while, by means of conducting atomic force microscopy, a remarkable and distinct electric response between regions is demonstrated. In particular, we obtain a switching behaviour on the crystal surface that is the characteristic of the bulk AgTCNQ material.

Authors : Aurelie Rexach, Alan Taylor, Geoff Melton, Alec Gunner
Affiliations : TWI, Granta Park, Cambridge, CB21 6AL; TWI, Granta Park, Cambridge, CB21 6AL; TWI, Granta Park, Cambridge, CB21 6AL; TWI, Granta Park, Cambridge, CB21 6AL

Resume : The main challenges faced by the protective weldable coatings have been identified in the industry as follows: 1) Influence of coating thickness on weldability and corrosion resistance properties, specifically: a) Thin films yielding good welding characteristics but inferior protection properties b) Thick films providing improved corrosion resistance at the expense of wedabiltity 2) Lack of mechanical durability that leads to coating damages during handling, storage and transportation 3) Zinc is used to provide galvanic protection, but: a) The weld quality may be affected b) Risks of health hazards when zinc is inhaled from the welding fumes. The key characteristics required to provide robust protective performance together with acceptable weld through capability are identified. Candidate chemistries that offer the opportunity to overcome these previously mutually exclusive behaviours are then explored, together with an approach to designing weldable corrosion-resistant multi-functional hybrid nanomaterials. These are explored though the example of a coating that meets the needs of Industry by building a novel multifunctional hybrid material based on nanomaterials compilation and synergy. The novel coating will be developed in the Weldaprime project (starting 01/02/14; FP7-European funding). This European project aims to develop an innovative coating that will be durable, zinc-free, weldable and provide corrosion protection for steel products for at least 1year.

Authors : E. Stratakis1,2*, M. Sigletou1,2, C. Petridis3, G. Kakavelakis2,3, C. Fotakis1,2, E. Kymakis3
Affiliations : 1) Institute of Electronic Structure and Laser, Foundation for Research & Technology Hellas, (IESL-FORTH), P.O. Box 1527, Heraklion 711 10, Greece 2) University of Crete, 710 03 Heraklion, Crete, Greece. 3) Technological Educational Institute (TEI) of Crete, Heraklion, 71003, Greece *, phone: 00302810391274, fax: 0030-2810391305

Resume : Photoactive polymers blended with plasmonic nanoparticles hold promise for the development of cost-effective, lightweight organic photovoltaic (OPV) devices [1]. Although many studies on the photovoltaic performance of plasmonic blends were performed, there are limited reports on their stability. The present work examines aspects of the photodegradation mechanisms during prolonged irradiation of plasmonic OPV blends and their respective devices. For this purpose, the stability characteristics of bulk heterojunction OPV blends incorporating surfactant free Au and Al nanoparticles (NPs) into the photoactive layer is investigated by Laser Induced Fluorescence and transient photoluminescence complemented by device degradation electrical measurements. The effect of NPs incorporation on the aging performance of OPV devices is further explored by correlating the fluorescence evolution over illumination time of pristine and NPs doped active layers with the photovoltaic characteristics of the respective devices. It is shown that besides the improved cell efficiency attributed to plasmon absorption and scattering effects, the embedded NPs act as performance stabilizers, giving rise to enhanced structural stability and, in turn, to reduced photodegradation rate. [1] E. Stratakis and E. Kymakis , Mater Today, 2013, 16, 138-151

Authors : Romain Aufaure, Yoann Lalatonne, Laurence Motte and Erwann Guénin
Affiliations : Laboratoire CSPBAT (UMR7244) ; LPBS ; Université Paris 13 ; France

Resume : Water soluble gold nanoparticles (GNPs) own physical and chemical properties with a large scope of application in the biomedical research. Our project aims to develop new synthetic pathways for the direct synthesis of GNPs already possessing functionality allowing easy access to bio functionalization. This is achieved by using synthesized water soluble molecules. These molecules are bifunctional : One functional group is able to both reduce gold(III) chloride and to coat the surface of the obtained GNPs. The other functional group will remain inert during the NPs synthesis and will allow further chemoselective GNPs functionalization. Herein we will present the mechanism of this GNPs synthesis. We have demonstrated the related mechanism of this colloid formation and the interaction between our bifunctional molecules and the gold surface by classical analytical chemistry techniques. Optimization of the various synthesis parameters (temperature, concentration and pH) have been assessed to yield homogeneous GNPs of size ranging from 13-21 nm. Then reactions at the surface with the remaining, functional group have been characterized, confirming their chemoselective reactivity. These new GNPs are also used as a building block for sized controlled covalent assemblies preparation. The controlled size assemblies are water soluble and presents specific optical properties shifting from blue to NIR absorption yielding to promising in vivo applications such as hyperthermia.

Authors : S. C. Nunes [1,2], R. A. S. Ferreira [3], L. D. Carlos [3], P. Almeida [1], V. de Zea Bermudez [2,4]
Affiliations : [1] Chemistry Department and CICS-UBI - Centro de Investigação em Ciências da Saúde, University of Beira Interior, 6200-506 Covilhã, Portugal; [2] Chemistry Department, University of Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal; [3] Physics Department and CICECO, University of Aveiro, 3810-193 Aveiro, Portugal; [4] CQ-VR, University of Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal

Resume : In the last decade the investigation of dye-doped hybrid materials has significantly increased because of their promising technological applications [1,2]. The incorporation of dyes into glasses via the sol–gel technique for the production of solid-state dye lasers was first reported in 1984 by Avnir et al. [3]. These authors demonstrated that the encapsulation of fluorescent guest species within hybrid structures is of interest to prevent the aggregation of the dye molecules and thus retain their high fluorescent quantum yield, and to increase their photostability. In the present work we have combined the sol-gel process with self-assembly routes to obtain dye-doped mono-amide cross-linked alkyl/siloxane hybrids (mono-amidosils). The mono-amidosil framework employed (m-A(14)) is a photoluminescent hierarchically structured lamellar bilayer hybrid that consists of 2D siliceous domains, separated by perpendicularly-oriented alkyl chains, self-assembled through tail-to-tail van der Waals interactions and hydrogen bonding interactions [4]. The addition of monomethinecyanine [5] and Rhodamine (B) methyl ester perchlorate dyes [6] to m-A(14) was reported recently. 1. B. Lebeau, P. Innocenzi, Chem. Soc. Rev., 2011, 40, 886. 2. A. Silva, R. E. F. Boto, R. M. El-Shishtaw, P. Almeida, Eur. Polym. J., 2006, 42, 2270. 3. D. Avnir, D. Levy, R. Reisfeld, J. Phys. Chem., 1984, 88, 5956. 4. L. D. Carlos; V. de Zea Bermudez, V. S. Amaral, S. C. Nunes, N. J. O Silva, R. A. Sá Ferreira, C. V. Santilli, D. Ostrovskii, J. Rocha, Adv. Mater., 2007, 19, 341. 5. S. C. Nunes, C. B. Ferreira, J. Hümmer, R. A. S. Ferreira, L. D. Carlos, P. Almeida, V. de Zea Bermudez, J. Mater. Chem. C, 2013, 1, 2290. 6. S. C. Nunes, V. T. Freitas, R. A. S. Ferreira, L. D. Carlos, P. Almeida, V. de Zea Bermudez, J. Sol-Gel Sci. Technol., accepted

Authors : S. C. Nunes [1,2], Vânia T. Freitas [3], R. A. S. Ferreira [3], L. D. Carlos [3], P. Almeida [1], V. de Zea Bermudez [2,4]
Affiliations : [1] Chemistry Department and CICS-UBI - Centro de Investigação em Ciências da Saúde, University of Beira Interior, 6200-506 Covilhã, Portugal; [2] Chemistry Department, University of Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal; [3] Physics Department and CICECO, University of Aveiro, 3810-193 Aveiro, Portugal; [4] CQ-VR, University of Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal

Resume : Inspired by Nature, the self-assembly of organic/inorganic hybrid materials provides an adequate approach for the production of hierarchical architectures and multifunctional nanostructures for a wide range of technological applications [1,2]. The combined use of sol-gel chemistry with self-directed assembly processes has been the preferred route to prepare ordered bridged and non-bridged silsesquioxane materials [3-5]. These studies revealed that the degree of order of silsesquioxanes may be easily tuned by subtle modifications of the synthetic conditions and through a judicious choice of the chemical nature of the organic and inorganic components. Recently we investigated a di-amide cross-linked alkyl/siloxane hybrid (di-amidosil, d-A(10)) derived from the (RO)3Si–(CH2)3–NHC(=O)–(CH2)10–C(O=)NH–(CH2)3–Si(OR)3 precursor. Materials with variable degrees of order and morphologies were obtained through a fine control of the experimental conditions (water content, type/concentration of catalyst, and presence/type/concentration of co-solvent) [6]. This work demonstrated that the balance between self-directed assembly and sol-gel condensation reactions that governs structuring of bridged silsesquioxane hybrids depends critically on the chemical nature of the cross-link and on its ability to form a strong, ordered and directional hydrogen bonded array [6]. In the present work we have further investigated the influence of several experimental parameters on the level of organization of the d-A(10) di-amidosil prepared under acid catalysis. 1. C. Sanchez, P. Belleville, M. Popall, L. Nicole, Chem. Soc. Rev. 2011, 40, 696. 2. C. Sanchez, H. Arribart, M. Madeleine, G. Guille, Nature Mater. 2005, 4, 277. 3. J. J. E. Moreau, L. Vellutini, M. Wong Chi Man, C. Bied, J.-L. Bantignies, P. Dieudonné, J.-L. Sauvajol, J. Am. Chem. Soc. 2001, 123, 7957. 4. L. D. Carlos; V. de Zea Bermudez, V. S. Amaral, S. C. Nunes, N. J. O Silva, R. A. Sá Ferreira, C. V. Santilli, D. Ostrovskii, J. Rocha, Adv. Mater., 2007, 19, 341. 5. S. C. Nunes, N. J. O. Silva, J. Hümmer, R. A. S. Ferreira, P. Almeida, L. D. Carlos, V. de Zea Bermudez, RSC Advances, 2012, 2, 2087. 6. S. C. Nunes, J. Hümmer, V. T. Freitas, R. A. S. Ferreira, L. D. Carlos, P. Almeida, V. de Zea Bermudez, submitted

Authors : N. Pereira, M. Fernandes, F. M. Nunes, V. de Zea Bermudez
Affiliations : Department of Chemistry and CQ-VR, University of Tras-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal

Resume : Polysaccharides are an attractive class of compounds for biomedical applications, due to their biocompatibility and structural similarity with biological systems. Natural polysaccharides often exhibit solubility problems due to the formation of strong and extensive hydrogen bonding interactions. One way of overcoming this problem is to employ ionic liquids (ILs) as solvents [1]. Interestingly, ILs can sometimes act as templates. In the context of the fabrication of scaffolds, this effect is of interest for micropatterning purposes [2]. In the present work we have synthesized and characterized silica-based hybrids composed of pectin or xanthan gum (XG). Different ILs, acting simultaneously as solvents and porogenic agents, have been incorporated with the goal of producing scaffolds for bone regeneration. Pectins are a family of covalently linked D-galacturonic acid-rich polysaccharides present in the primary cell walls of plants [3]. XG is a high molecular weight polysaccharide produced by Xanthomonas Campestris in aerobic conditions from sugar cane, corn or their derivatives [4]. XG is widely used in food, pharmaceuticals and personal care. [1] R. P. Swatloski, S. K. Spear, J. D. Holbrey and R. D. Rogers, J. Am. Chem. Soc., 2002, 124, 4974. [2] U. Sang Shin, J.-G. Kim, Bull. Korean Chem. Soc. 2012, 33, 2295. [3] D. Mohnen, Curr. Opin. Plant Biol. 2008, 11, 266. [4] V. Blasques Bueno, R. Bentini, L. H. Catalani, D. F. S. Petri, Carbohydrate Polym., 2013, 92, 10.

Authors : Y. Gucbilmez1, I. Calis1, A.S.Guler2
Affiliations : 1 Anadolu University, Department of Chemical Engineering 2 Bilecik Şeyh Edibali University, Department of Chemical and Process Engineering

Resume : High surface area palladium incorporated mesoporous, nano-structured MCM-41 catalysts have been synthesized using the wet impregnation technique and the catalytic activiy was tested in a gas phase reaction system. The one-pot oxidative synthesis of ethyl acetate was performed in a fixed bed reactor, into which 0.2 gram catalyst was loaded, was heated to the reaction temperatures using a tubular furnace Parameters to be tested involved the reaction temperature which ranged between 100-250oC and O2/EtOH molar ratio which ranged between 0.5 (stoichiometric ratio) and 1.0. It was seen that the two main reaction products were ethyl acetate and acetaldehyde. Carbon dioxide was formed due to complete oxidation however no carbon monoxide was released as a result of partial burning. Some acetic acid formation was also detected. The selectivity and yield of ethyl acetate along with reaction conversion increased until 225oC and started decreasing at 250oC implying the poisining of the catalyst at this temperature. The optimum reaction yield was obtained as 0.308 for an O2/EtOH molar ratio of 0.9 at 225oC.

Authors : D. Konios1, G. Viskadouros1, C. Petridis1, M.M. Stylianakis1, E.Stratakis1,2, E. Kymakis1
Affiliations : 1. Center of Materials Technology and Photonics & Electrical Engineering Department, Technological Educational Institute (TEI) of Crete, Heraklion 71004 Crete, Greece 2. Institute of Electronic Structure and Laser, Foundation for Research and Technology - Hellas, P.O. Box 1527, 711 10 Heraklion Crete, Greece

Resume : This contribution will present our recent work on the reduction, functionalization and doping of graphene oxide (GO) sheets and their incorporation into polymer matrices targeting on polymer-graphene hybrids with tailored properties. In particular, chemical reduction methods of GO using a wide range of reducing agents such as hydriodic acid, hydrazine and ammonia were employed and directly correlated with photochemical methods for the reduction and/or doping of GO sheets through pulsed UV laser irradiation of GO solutions in liquid media. Various chemical functionalization schemes developed, such as covalent or non-covalent modification with surfactants and/or polymer chains, were subsequent employed for the fabrication of polymer-graphene hybrids. Furthermore, as a proof of concept the polymer-graphene hybrids were deposited on the surface of forests of microconical Si spikes to form a 3D regular array of micro/nano structured field emitters. Particular attention was paid on the effect of the morphology of the hierarchical emitters attained to the field enhancement properties of the 3D cathode elements.

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SESSION Q.13 : Seong-Ju Hwang
Authors : L. Valentini1,2, J. M. Kenny1,2,3
Affiliations : 1 Dipartimento di Ingegneria Civile e Ambientale, Università di Perugia, Strada di Pentima 4, 05100 Terni - Italy; 2 INSTM Consortium for Materials Science and Technology, Via Giusti 9, 50121 Firenze, Italy, Local Research Unit; 3 Institute of Polymer Science and Technology, CSIC, Juan de la Cierva 3, 28006 Madrid – Spain.

Resume : In the past years, thanks to the availability of new advanced high performance materials, printable and environmental friendly electronic has led to the rapid development of miniaturized electronic devices. These devices could be integrated on substrates in order to facilitate both the manufacturing process and the portability. From the environmental point of view, polymeric matrices that can be obtained from plant renewable sources not in competition with the food chain are certainly the best solution. These materials, in addition to being derived from renewable source, may also be biodegradable under specific conditions. These characteristics, together with their easily processability with various industrial manufacturing techniques and the possibility to generate hybrids with the combination of different nanoparticles, make them excellent candidates for the development of new electronic devices, which associate the miniaturization of the electronic component with the low environmental impact of the matrix in which they are hold. In this context, the work here presented aims to explore the potential use of graphene hybrids. They represent a class of recently developed composite materials with unique functional properties for the development of sensors and optoelectronic devices integrated in eco-friendly supports. In this work the functionalization strategy, the ink formulation and printing as well as the technologies for graphene hybrids transfer will be reviewed and disc

Authors : Gonzalo Abellán,1 Concha Bosch-Navarro,1 Jose G. Martínez,2 Carlos Martí-Gastaldo,1 Eugenio Coronado,1 Toribio F. Otero,2
Affiliations : 1-Instituto de Ciencia Molecular, Universidad de Valencia, Catedrático José Beltrán 2, 46980, Paterna, Valencia, Spain. 2-Center for Electrochemistry and Intelligent Materials (CEMI), Universidad Politécnica de Cartagena, Aulario II, E-30203, Cartagena, Spain.

Resume : Hybrid inorganic/organic materials have found many applications because they allow combining the properties of inorganic solids such as robustness, durability or mechanical strength with those introduced by the organic component such as functionality, tunability and convenient derivatization by synthesis. Recently, graphene (G) and related 2D materials have attracted a considerable attention due to their high conductivity, high Young’s modulus and the possibility to be tailored by chemical modification. In this sense, layered double hydroxides (LDHs) are promising candidates for the development of hybrid functional materials due to their chemical versatility and the broad range of applications they exhibit. Among these applications, those related with energy storage are of utmost importance. In this context, we are interested in the development of hybrid G/LDHs materials active as oxygen evolution reaction (OER) electroctalyst. Herein, we have developed the one-pot formation of a nanocatalyst by in-situ hybridization of NiFe-LDH with G exhibiting high OER catalytic activity. Moreover, the low-temperature annealing under N2 of the hybrid gives rise to an active 2D strongly coupled bi-component NiO/NiFe2O4-G. Furthermore, we have deeply characterized their physical and electrochemical properties shedding light on their behaviour as electrode material for supercapacitors, and as efficient OER electrocatalyst, obtaining excellent performances.

Authors : Yong-Jae Kim, Chul-Hee Cho, Inhye Kim, Bumjoon J. Kim, Eunji Lee
Affiliations : Graduate School of Analytical Science and Technology, Chungnam National University, Republic of Korea; Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Republic of Korea

Resume : We will present a simple fabrication of hybrid nanowires (NWs) composed of a p-type conjugated polymers (CPs) and n-type inorganic quantum dots (QDs) by exploiting the crystallization-driven solution assembly of poly(3-hexylthiophene)-based rod-coil amphiphiles. The visualization of the crystallization-driven growth evolution of hybrid NWs through systematic transmission electron microscopy (TEM) experiments showed that discrete dimeric CdSe QDs bridged by CPs were generated during the initial state of crystallization. These, in turn, assemble into elongated fibrils, forming the coaxial hybrid NWs. In particular, the location of the QD arrays within the single strand of CP NWs can be controlled precisely by manipulating the regioregularity (RR) values of P3HT block and the relative ratios of blocks. The degree of coaxiality of the QD arrays was shown to depend on the coplanarity of the thiophene rings of P3HT block, which can be controlled by the RR value of P3HT block. In addition, we demonstrate that the location of QDs could be regulated at the specific-local site of NW according to the surface characteristics of QDs. As an example, the comparison of two different QDs coated with hydrophobic alkyl-terminated and hydroxyl-terminated molecules, respectively, is used to elucidate the effect of the surface properties of QDs on their nano-location in the NW.