Chapter 21: 21.3 (page 566)
Explain why the information from an XPS chemical shift must also be contained in an X-ray absorption edge.
The chemical shift information provided by XPS must also be present in the compound's absorption edge of an X-ray absorption spectrum.
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An XPS electron was found to have a kinetic energy of when ejected with an source
and measured in a spectrometer with a work function of . The electron is believed to be a electron in .
(a) What was the binding energy for the electron?
(b) What would be the kinetic energy of the electron if a source were used?
(c) How could one be sure that a peak was an XPS and not an Auger electron peak?
(d) At what binding and kinetic energies would a peak for be expected when the source was used with the same spectrometer?
An XPS electron was found to have a kinetic energy of when ejected with an source and measured in a spectrometer with a work function of localid="1646388240338" . The electron is believed to be a localid="1646339446969" electron in NaNO3.
(a) What was the binding energy for the electron?
(b) What would be the kinetic energy of the electron if a Mg Klocalid="1646339452408" source were used?
(c) How could one be sure that a peak was an XPS and not an Auger electron peak?
(d) At what binding and kinetic energies would a peak for NaNO2 be expected when the AI Klocalid="1646339460791" source was used with the same spectrometer?
Name three possible sources of signals with the SEM. Differentiate between elastic and inelastic scattering of electrons.
Describe the mechanism of the production of an LMM Auger electron.
If the tunneling current is when an STM probe is from a surface and when the probe is from the surface, calculate the current on moving the tip in steps from to .
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