Three-Dimensional Chemical Mapping with a Confocal XRF Setup

A new approach for the nondestructive reconstruction of stratified systems with constant elemental composition but with varying chemical compounds has been developed. The procedure is based on depth scans with a confocal X-ray fluorescence setup at certain energies near absorption edges. These so-ca...

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Published inAnalytical chemistry (Washington) Vol. 85; no. 7; pp. 3682 - 3689
Main Authors Lühl, Lars, Mantouvalou, Ioanna, Schaumann, Ina, Vogt, Carla, Kanngießer, Birgit
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 02.04.2013
Subjects
Chemical compounds
Chemical reactions
Fluorescence
Mapping
Oxidation
Topology
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Summary:A new approach for the nondestructive reconstruction of stratified systems with constant elemental composition but with varying chemical compounds has been developed. The procedure is based on depth scans with a confocal X-ray fluorescence setup at certain energies near absorption edges. These so-called marker energies, where XAFS signals of the involved chemical compounds differ significantly, can also be used to uncover the chemical composition and its topology. A prominent field of application is homogeneous material that is degraded due to chemical reactions like oxidation or reduction. A procedure for the semiquantitative reconstruction of stratified material by means of depth scans at marker energies is elaborated and validated and a three-dimensional mapping is presented.
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ISSN:0003-2700
1520-6882
DOI:10.1021/ac303749b