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NANOMATERIALS

K

Defect-induced effects in nanomaterials

Following a great success of the three previous similar symposia (more than 200 submitted abstracts), this symposium addresses the progress in tailoring basic properties of low-dimensional and nano-materials by introducing dopants (e.g., implantation) or creating growth- and radiation-induced defects. The latest achievements in theory and experiment will be presented and discussed by academic and industrial researchers.

Scope:

Solids without defects are impossible for thermodynamic reasons. The defects are a Janus Bifrons: they can deteriorate the properties of materials and structures, but they can also provide them with unique and useful properties which are absent in the perfect solids. As we are living more and more in a world replete with manmade nanoobjects, it obviously pays to invest efforts in studies of defects in them. The high sensitivity of modern technologies on the submicron scale has promoted the exciting opportunity of developing new advanced materials with reduced dimensionality. This opens new prospects for ion and electron beam applications. Ion tracks and other radiation-induced effects provide a means for controlled synthesis and modification of low-dimensional materials, such as nanoclusters and nanowires, allowing for efficient nano- and optoelectronic devices. Defect behavior in nanomaterials and nanostructures in its turn has often been found to differ substantially from that observed in bulk materials. Recent work has demonstrated spectacular optical and magnetic effects due to deliberately created defects or radiation-induced transformation of nanomaterials as well as radiation-induced displacements in low-dimensional insulators and semiconductors, with numerous potential applications. We plan to discuss how such defects could be introduced controllably, categorized and controlled in nanostructures. Understanding and controlling defect properties in a wide class of advanced nanostructures (novel 2D materials, multiferroics, quantum dots and wires, etc.) could well be a key to breakthroughs in several crucial areas of science and technology. This is the main focus of the symposium.

Hot topics to be covered by the symposium:

  • Defects in graphene and other 2D materials
  • Swift heavy ion irradiation as the means to tailor nanomaterials
  • Effects of grain boundaries and interfaces on the diffusion and transport processes in nanomaterials.
  • Electronic structure of defects in nanostructures; consequences for carrier transport, magnetism, optical and electronic properties, as well as device parameters.
  • Creation, evolution and properties of radiation defects in nanosize materials and heterostructures; the role of interfaces, nonstoichiometry, strain and adjacent layers.
  • Use of defects as microprobes.
  • Multiscale computer modeling of defect creation and transformation in nanomaterials.
  • Novel technological processes of micro-, nano- and optoelectronics using defects and radiation effects in nanostructures.

List of invited speakers

  • Hanns-Ulrich Habermeier, MPI for Solid State Research, Stuttgart, Germany “Materials challenges and recent developments in oxide thermoelectrics”
  • Teresa Monteiro, University of Aveiro, Portugal “Optical studies in multifunctional wide bandgap nanomaterials”
  • Marjeta Maček Kržmanc, Jožef Stefan Institute, Ljubljana, Slovenia “Defined-shape ferroelectric nanoparticles: synthesis and prospects for energy-harvesting applications”
  • Edith Bucher, Montanuniversität Leoben, Austria, “Stability of complex perovskites under solid oxide fuel cell operation conditions”
  • Graeme Watson, Trinity College Dublin, Ireland “Ab initio calculations of structure and reducibility of doped CeO2
  • Alexander Ya. Polyakov, NUST “MISiS”, Moscow, Russia “III-Nitrides nanopillars as building blocks for advanced LEDs”
  • Sebastian van Dijken, Aalto University, Finland “In situ TEM observation of oxygen vacancy driven structural and resistive phase transitions in La2/3Sr1/3MnO3
  • Maria Eugenia Toimil-Molares, GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany “Nanostructures fabricated by ion-track technology”

A joint session with Symposium Y “New developments in the modeling and analysis of radiation damage in materials” is foreseen on the following topics:

  • In situ TEM and atom probe tomography and
  • Ab initio calculations and numerical simulations

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Symposium organizers
Eugene KOTOMINInstitute of Solid State Physics, University of Latvia; Max Planck Institute for Solid State Research, Stuttgart, Germany

Kengaraga 8, Riga LV-1063, Latvia; Heisenbergstr. 1, Stuttgart 70569, Germany

+371 67187 480; +49 711 689 176
kotomin@latnet.lv; kotomin@fkf.mpg.de
Flyura DJURABEKOVAUniversity of Helsinki

Helsinki Institute of Physics and Department of Physics, PB 43, 00014 Helsinki, Finland

+358 9 19150084
flyura.djurabekova@helsinki.fi
Nikolai A. SOBOLEVUniversidade de Aveiro

Departamento de Física and I3N, Campus de Santiago, 3810-193 Aveiro, Portugal

+351 234 378117
sobolev@ua.pt