Reconstruction Procedure for 3D Micro X-ray Absorption Fine Structure

A new approach for chemical speciation in stratified systems using 3D Micro-XAFS spectroscopy is developed by combining 3D Micro X-ray Fluorescence Spectroscopy (3D Micro-XRF) and conventional X-ray Absorption Fine Structure Spectroscopy (XAFS). A prominent field of application is stratified materia...

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Bibliographic Details
Published in:Analytical chemistry (Washington) 2012-02, Vol.84 (4), p.1907-1914
Main Authors: Lühl, Lars, Mantouvalou, Ioanna, Malzer, Wolfgang, Schaumann, Ina, Vogt, Carla, Hahn, Oliver, Kanngießer, Birgit
Format: Article
Language:English
Subjects:
Algorithms
Analytical chemistry
Chemistry
Exact sciences and technology
Fluorescence
Spectrometric and optical methods
Spectrum analysis
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Summary:A new approach for chemical speciation in stratified systems using 3D Micro-XAFS spectroscopy is developed by combining 3D Micro X-ray Fluorescence Spectroscopy (3D Micro-XRF) and conventional X-ray Absorption Fine Structure Spectroscopy (XAFS). A prominent field of application is stratified materials within which depth-resolved chemical speciation is required. Measurements are collected in fluorescence mode which in general lead to distorted spectra due to absorption effects. Developing a reliable reconstruction algorithm for obtaining undistorted spectra for superficial and in-depth layers is proposed and validated. The developed algorithm calculates the attenuation coefficients of the analyte for the successive layers facilitating a new spectroscopic tool for three-dimensionally resolved nondestructive chemical speciation.
ISSN:0003-2700
1520-6882
DOI:10.1021/ac202285d