Physics – Condensed Matter – Materials Science
Scientific paper
Oct 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004spie.5535...29r&link_type=abstract
Developments in X-Ray Tomography IV. Edited by Bonse, Ulrich. Proceedings of the SPIE, Volume 5535, pp. 29-35 (2004).
Physics
Condensed Matter
Materials Science
Scientific paper
In various scientific fields -- such as materials sciences, biology or even astrophysics -- the relation between morphology and the chemical composition is a key for the understanding of structures and their function. Hard x-ray tomography is a suitable tool for structural analyzes on the micrometer scale and can give additional chemical information by combining this imaging technique with spectroscopic methods. In chemistry, X-ray absorption near-edge spectroscopy (XANES) is a well-known and established technique. By scanning the X-ray energy in the vicinity (50-100 eV) of the absorption edge of an element, information can be obtained about the oxidation state of the probed atoms. We used a fast read-out and low noise detector for XANES imaging and were able to distinguish different oxidation states in three dimension performing tomographic scans at different characteristic energies of the probed atom.
Rau Christoph
Simionovici Alexandre S.
Somogyi Andrea
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