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Journal of Spectroscopy
Volume 2015, Article ID 618279, 7 pages
http://dx.doi.org/10.1155/2015/618279
Research Article

Oxide Nanolayers in Stratified Samples Studied by X-Ray Resonant Raman Scattering at Grazing Incidence

1Facultad de Matemática Astronomía y Física, Universidad Nacional de Córdoba, 5000 Córdoba, Argentina
2CONICET, Argentina
3Laboratorio Nacional de Luz Síncrotron, CP 6192, 13084-971 Campinas, Brazil

Received 23 October 2014; Accepted 16 February 2015

Academic Editor: Rafal Sitko

Copyright © 2015 Juan José Leani et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

X-ray resonant Raman scattering is applied at grazing incidence conditions with the aim of discriminating and identifying chemical environment of iron in different layers of stratified materials using a low resolution energy dispersive system. The methodology allows for depth studies with nanometric resolution. Nanostratified samples of Fe oxides were studied at the Brazilian synchrotron facility (LNLS) using monochromatic radiation and an EDS setup. The measurements were carried out in grazing incident regime with incident photon energy lower than and close to the Fe-K absorption edge. The result allowed for characterizing oxide nanolayers, not observable with conventional geometries, identifying the oxidation state present in a particular depth of a sample surface with nanometric, or even subnanometric, resolution using a low-resolution system.