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Related Experiment Videos

X-ray mapping in electron-beam instruments.

John J Friel1, Charles E Lyman

  • 1Princeton Gamma Tech, C/N 863, Princeton, NJ 08542, USA.

Microscopy and Microanalysis : the Official Journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada
|May 8, 2007
PubMed
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X-ray mapping, a key electron beam microanalysis technique, has evolved over 50 years. Current methods offer high-resolution elemental distribution analysis in both bulk and thin specimens, advancing from qualitative to quantitative applications.

Area of Science:

  • Materials Science
  • Analytical Chemistry
  • Physics

Background:

  • X-ray mapping is a crucial capability in electron beam microanalysis.
  • It enables the visualization of elemental distributions and associations within specimens.
  • Historically, it has been operator-dependent, requiring decisions on data collection locations.

Purpose of the Study:

  • To review the historical development of X-ray mapping techniques.
  • To highlight current advancements in X-ray mapping analysis.
  • To discuss the transition of X-ray mapping towards quantitative applications.

Main Methods:

  • Review of historical and current X-ray mapping methodologies.
  • Application of X-ray mapping in Scanning Electron Microscopy (SEM) and Electron Probe Microanalysis (EPMA) for bulk specimens.

Related Experiment Videos

  • Application of X-ray mapping in Transmission Electron Microscopy (TEM) and Scanning Transmission Electron Microscopy (STEM) for thin specimens.
  • Integration of spectral data collection at each pixel.
  • Main Results:

    • X-ray mapping provides high spatial resolution (1 µm for bulk, 2-100 nm for thin specimens).
    • Modern techniques allow for unbiased detection of elemental distributions and unexpected associations.
    • Recent developments enable quantitative X-ray mapping and full spectral data acquisition per pixel.

    Conclusions:

    • X-ray mapping has evolved significantly over 50 years.
    • Current techniques offer enhanced capabilities for elemental analysis with improved resolution and quantitative accuracy.
    • The ability to collect and analyze full spectral data at each pixel is a major advancement, with ongoing development in data mining.