Naslov
Small Angle X-ray Scattering at the Austrian SAXS beamline at Elettra

Autori
Juraić, Krunoslav

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
22nd International scientific meeting on vacuum science and techniqu: programme and book of abstracts / Janez Kovač, Gregor Jakša - Ljubljana : Društvo za vakuumsko tehniko Slovenije, 2015, 13-13

ISBN
978-961-92989-7-8

Skup
22nd International scientific meeting on vacuum science and techniqu

Mjesto i datum
Osilnica, Slovenija, 21.08.2015. - 22.08.2015

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
SAXS; Elettra

Sažetak
The scattering of X-rays at small angles (SAXS, close to the primary beam) was found to provide structural information via inhomogeneities of the electron density with characteristic dimensions between one and a few hundred nm. SAXS was for the first time applied for the study of metallic alloys (Guinier) 20 years ago. Today SAXS is a powerful technique for structural analysis of various types of materials: metal alloys, polymers in solution and in bulk, biologic materials (tendons, muscles, macromolecules in solution), emulsions, porous materials, nanoparticles, aerosol, etc. SAXS can provide information about the shape, size and distribution of nanoparticles and larger molecules, and also the internal structure of disordered and partially ordered systems. In most typical experiments, the SAXS technique is performed in transmission geometry. In situations where the transmission mode is not a feasible option, such as when the sample of interest is a thin film on an opaque substrate or when only the surface microstructure is of interest, Grazing Incidence SAXS (GISAXS) is used, i.e. grazing incidence reflection geometry to obtain information from surfaces and near surface parts of material. The SAXS / GISAXS technique has many advantages: it provides a non- destructive structural probe, it does not require a special sample preparation, can be applied for in situ characterization, yields an excellent sampling statistics (average over a macroscopic range of several mm), provides information on the nanometer scale about the particle geometry, size distribution, spatial correlation etc. As SAXS measurements are done close to the primary beam ( ̋small angels ̋), it requires a very brilliant source of X-rays, like synchrotron radiation. At the synchrotron Elettra near Trieste (Italy) is the Austrian SAXS- beamline which is an outstation of the Institute of Inorganic Chemistry (Graz University of Technology) from Graz, Austria. In this talk will be presented the experimental possibilities of the Austrian SAXS-beamline showing examples from pharmacy and material science.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA