Overview of Doma Cafe Electric Brewing Coffee Grounds X-Ray Photoelectron Spectroscopy
What is X-Ray Photoelectron Spectroscopy ? X-ray photoelectron spectroscopy (XPS) is a surface sensitive, non-destructive technique used routinely to analyze the outermost ~10 nm (~30 atomic layers) of natural and engineered materials.
• X-ray photon ionizes an atom and causes the emission of a photoelectron . • Kinetic energy of the photoelectrons depends on: ØEnergy of the incident X-ray photons ØBinding energy of the electron ØWork function of the sample (in practice we use the work function of the spectrometer)
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After a brief recapitulation of the historic development of photoelectron spectroscopy , we review the attempts to interpret, in particular, x-ray photoelectron spectra to extract information on electronic structure and constitution, i.e. stoichiometry of materials systems.
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