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Beata Kalska-Szostko

Beata Kalska-Szostko

University of Bialytsok, Poland

Title: Hierarchical nano- or bio-composites based on magnetic nanostructures

Biography

Beata Kalska-Szostko Professional Experience Include: 2003 - now: University of Bialystok, Institute of Chemistry, adiunkt. Set- up of the nanotechnology laboratory. The experimental work on synthesis and electrodeposition of nanomaterials. Structural and magnetic characterization of the nanomaterials. Experience in: - synthesis of the nanoparticles, - electrodeposition of the nanowires, - scanning electron microscopy, - atomic force microscopy, - Mssbauer spectroscopy. 2001 - 2003: Free University Berlin, Institute of Experimentalphysics, post-doc. Participation in the RTN European network "Correlation of Structure and Magnetism in Novel Nanoscale Magnetic Particles". The experimental work on magneto-optical characterization of the nanoparticles. In addition experience in the molecular beam epitaxial deposition, ultra high vacuum techniques, ie. characterization by Auger electrons, in situ atomic force microscopy, RHEED. 1998 - 2000: Uppsala University, Department of Physics, Ph.D studies. Experimental work on characterization by Mössbauer spectroscopy and x-ray difractometry various materials like: bulk, multilayers, thin films, nanoparticles, batteries, gas sensors etc. Transmission electron microscopy, SQUID, XRD courses. Research Grants/Fellowships: 2001-2003 Freie Universitst Berlin, 30 months fellowship from the network "Correlation of Structure and Magnetism in Novel Nanoscale Magnetic Particles" 1996 Uppsala University - 4 months TEMPUS fellowship Publications 42 - publications in the international journals 55 - presentations and abstracts on the international conferences

Abstract

It can be seen that from the last decade of previous centaury a vase number of investigations is dedicated to nanomaterials and their unusual properties. Recently, however researches went further and start to combine few nanostructures in one hierarchical formation. Among others biorelated nanocomposites become driving force for huge number and very promising investigations. For example combination of the magnetic nanostructure nanowires or nanoparticles with bioactive molecules leads to a novel hybrid system which combine properties of nanostructures and bioparticle in one spices. In such manner specific recognition or catalytic properties of biomaterials are convoluted with the attractive electronic, optical, magnetic and structural characteristics of magnetic spices. To obtain functional biocomposite, nanostructures should be properly characterized from the structural and magnetic point of view. In addition it should be modified in special manner at the surfaces what can be realized by bonding or adsorption of various linkage chemistries. The drawback is that practically each application needs its own surface characteristic and activity. Therefore functional compounds can be directly bonded with organic molecules or via interconnectors. The other option is non-covalent interactions with for example fatty acids or proteins. Different ligands -SH, -COOH, -OP, -CN with different affinity either to the modified surfaces or bioparticles can be obtained. The reason why magnetic nanostructures with especial emphasis on nanowires and nanoparticles are considered as a promising candidate of biocomposite constituents is their easily modulated magnetic properties, which gives access to the fast and easy manipulation tool via use of the external magnetic field. Structural and magnetic properties of the presented magnetic nanowires and composites will be discussed on base of result obtained by: XRD, TEM, IR and Mössbauer spectroscopy.