講演者：Felix G. Requejo 氏（National University of La Plata, ARGENTINA）
日時：５月　１３日（水）　午後５時００分から
　＊いつもと曜日・時間が異なります
場所： 青山学院大学　理工学部（相模原キャンパス）Ｌ棟６階　Ｌ６０３室

題目： 「Looking at the nano-cosmos for new properties: 
Nanoparticles as "new" materials」



要旨：
　At the beginning a short presentation about High education 
in Argentine will be presented. We will describe general aspects 
in Argentine, the particular case at the National University of 
La Plata and the state of higher education in Science specifically.


To understand their novel properties, nanostructured materials 
have to be characterized in detail from structure, geometry, 
electronics, and magnetism. One would like to have information 
about: geometric structure, "crystal structure", size and shape 
of the particle or porous, bond lengths, composition, electronics 
(for example oxidation state and band structure), interaction 
between nanomaterials and the protective capping, interaction 
between porous and surfactants (templates), magnetic properties 
in selective way, magnetic moments, saturation magnetization, 
blocking temperature, etc.

Using x-ray absorption and dispersion based techniques (XAFS and SAXS) 
for characterization of nanoscaled matter relevant structural 
and electronic local information can be obtained even at severe 
conditions (temperature, pressure, magnetic field, etc). The use 
of both methodologies allows relevant and independent structural 
and electronic characterization of nano-objects like nanoporous 
materials, nanoparticles or nanotubes.

It is shown a set of examples of different kind of metallic 
nanoparticles, analyzed by XAFS and SAXS techniques can show 
"anomalous" electronic, thermodynamic or structural properties and 
characteristics in comparison with corresponding "bulk state".

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