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Obtaining 3D Chemical Maps by Energy Filtered Transmission Electron Microscopy Tomography
08:15

Obtaining 3D Chemical Maps by Energy Filtered Transmission Electron Microscopy Tomography

Published on: June 9, 2018

Three-dimensional chemical mapping with a confocal XRF setup.

Lars Lühl1, Ioanna Mantouvalou, Ina Schaumann

  • 1Technische Universität Berlin, Berlin, Germany. Lars.Luehl@physik.tu-berlin.de

Analytical Chemistry
|March 1, 2013
PubMed
Summary
This summary is machine-generated.

This study introduces a new method for analyzing stratified materials by using X-ray fluorescence depth scans. This technique reveals chemical compound variations in materials, aiding in understanding degradation processes.

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Last Updated: May 13, 2026

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Published on: February 17, 2018

Area of Science:

  • Materials Science
  • Analytical Chemistry
  • Physics

Background:

  • Stratified systems with constant elemental composition but varying chemical compounds are challenging to analyze non-destructively.
  • Degradation of homogeneous materials due to chemical reactions (e.g., oxidation, reduction) requires advanced characterization techniques.

Purpose of the Study:

  • To develop a novel, non-destructive method for reconstructing the chemical composition and topology of stratified systems.
  • To enable the analysis of materials with uniform elemental composition but diverse chemical compounds.

Main Methods:

  • Utilizing depth scans with a confocal X-ray fluorescence (XRF) setup.
  • Employing specific 'marker energies' near absorption edges where X-ray Absorption Fine Structure (XAFS) signals differ significantly between chemical compounds.
  • Performing semi-quantitative reconstruction and 3D mapping based on XRF depth profiles.

Main Results:

  • Successfully developed and validated a procedure for non-destructive reconstruction of stratified materials.
  • Demonstrated the ability to uncover chemical composition and topology using marker energies.
  • Presented a method for semi-quantitative reconstruction and 3D mapping of chemical variations.

Conclusions:

  • The developed confocal XRF depth scanning approach effectively reconstructs stratified systems with varying chemical compounds.
  • This method is particularly valuable for analyzing degraded homogeneous materials and understanding chemical transformations.
  • The technique offers a powerful tool for detailed material characterization and 3D chemical mapping.