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EDX vs. XPS

  1. Jun 10, 2012 #1
    Can someone help explain the difference between EDX(Energy-dispersive X-ray spectroscopy) vs. (XPS) X-ray photoelectron spectroscopy? Which is used for what application? Advantages/Disadvantages of each?

    From what I have been reading from documentation, they seem to be the same.

    Thanks.
     
  2. jcsd
  3. Jun 10, 2012 #2

    Astronuc

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    Staff: Mentor

    EDX/EDS measures X-rays emitted from a sample, while XPS measures photoelectrons emitted from a sample. They are somewhat related.

    "Energy-dispersive X-ray spectroscopy (EDS or EDX) is an analytical technique used for the elemental analysis or chemical characterization of a sample." "To stimulate the emission of characteristic X-rays from a specimen, a high-energy beam of charged particles such as electrons or protons (see PIXE), or a beam of X-rays, is focused into the sample being studied." The process relies on the uniquness of characteristic X-rays of each element.

    Ref: http://en.wikipedia.org/wiki/Energy-dispersive_X-ray_spectroscopy

    http://micron.ucr.edu/public/manuals/EDS-intro.pdf [Broken]

    http://mee-inc.com/eds.html

    http://serc.carleton.edu/research_education/geochemsheets/eds.html


    X-ray photoelectron spectroscopy measures the characteristic photoelectrons emitted from a material. XPS spectra are obtained by irradiating a material with a beam of X-rays while simultaneously measuring the kinetic energy and number of electrons that escape from the top 1 to 10 nm of the material being analyzed. XPS requires ultra-high vacuum (UHV) conditions.

    Ref: http://en.wikipedia.org/wiki/X-ray_photoelectron_spectroscopy


    http://www.phi.com/surface-analysis-techniques/xps.html

    http://www.eaglabs.com/mc/x-ray-photoelectron-spectroscopy.html

    http://mmrc.caltech.edu/SS_XPS/XPS_PPT/XPS_Slides.pdf
     
    Last edited by a moderator: May 6, 2017
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