Welcome

Welcome to the homepage of the 5th Szeged International Workshop on Advances in Nanoscience, SIWAN! Registration is now open to the Conference and we are looking forward to hearing about your nanoscience and nanotechnology related work.

SIWAN nanoscience & nanotechnology conference welcomes contributions on a wide range of the related topics including synthesis and characterization of nanostructures and nanocomposites; improving our fundamental understanding of physics and chemistry at the nanoscale; applications of nanostructures in structural materials, catalysis, energy storage, energy conversion and electronics; scale-up and commercialization of nanomaterial production; bionanomaterials; health and safety issues related to the manufacturing and usage of nanoproducts

See you at Szeged in October 2012!

Abstract of the Week
01. Molecular plasmonics – biomolecules meets the colourful world of nanoparticles
A. Csaki, A. Kopielski, C. Leiterer, T. Schneider, J. Wirth and W: Fritzsche

Nanoscale objects, especially metal nanoparticles offer optical behaviour completely different from bulk material based on their high surface-to-volume-ratio and effects based on their nano confinement behaviour. So these nanostructures can be allow novel readout principles for future biosensings and labelling techniques are nice antennas for optical nano biomanipulations or parts in novel photonic devices. Metal nanoparticles show by interactions with electromagnetic field well defined localized surface plasmon resonance (LSPR) based on the collective oscillation of their conduction electrons.Read more »
02. The study of the inversion degree in zinc ferrite nanocrystals dispersed on a highly porous silica aerogel matrix
A. Corrias, D. Carta, D. Loche and C. Marras

Bulk zinc ferrite is a normal spinel with Zn2+ cations occupying tetrahedral sites and Fe3+ cations occupying octahedral sites. Therefore, it is not magnetic at room temperature, with a TNéel = 10K. However, a rearrangement of the cation distribution has been observed when this ferrite is at the nanoscale and a partially inverted structure is obtained, which is responsible for an enhanced magnetization. Therefore, this is an ideal system to study the effect of particles size on the distribution of cations in ferrospinels. Read more »
03. Design of semiconductor nanostructured materials using theory
V. Mlinar

Understanding the structure-property relationship in semiconducting nanostructures is key to tailoring technologically important physical properties and can lead to the design of new nanostructured materials [1]. Examples include nanostructures in optoelectronic devices ranging from solar cells and novel lasers, to physical representations of a quantum bit, or single polarized photon sources emitting quantum bits. Read more »
04. Functionalization of multi-wall carbon nanotubes with a bio-inspired hydrogenase mimic for hydrogen evolution and uptake
B. Jousselme, A. Le Goff, P. D. Tran, A. Morozan, N. Guillet, V. Artero, S. Palacin and M. Fontecave

Among the new energy technologies, the use of hydrogen is an attractive solution. However, the hydrogen energetic chain must produce hydrogen in large quantities from water in devices called electrolyzers, and secondly use hydrogen in fuel cells to provide electricity through its oxidation. Currently these processes require using platinum as a catalyst. However, this metal is extremely rare and therefore very expensive. Getting rid of platinum and developing efficient materials that contains only abundant and cheap elements is a major challenge for the future of the hydrogen energetic chain.Read more »
05. Magnetism and spintronics arising from graphene edges
J. Haruyama

Graphene, an ultimate two-dimensional molecule sheet with thickness as thin as one carbon atom size, is attracting significant attention. Although a variety of exciting phenomena has been experimentally reported in graphenes, none has experimentally reported on edge-related phenomena. Basically, there are two kinds of atomic structures in graphene edges; the so-called arm chair [1] and zigzag edges. Theoretically, zigzag edge yields a flat energy band, which makes electrons localize around the edge. The localized electrons are spontaneously spin-polarized due to strong electron interaction arising from extremely high electron density of states. It makes research of spin phenomena and applications to novel spintronic devices possible in spite of a material consisting of only carbon atoms with sp2 orbitals. None has, however, reported on experimental observation of edge-related phenomena, because lithographic fabrication of graphene edges easily introduces disorder.Read more »

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