Transcription of X-Ray Photoelectron Spectroscopy (XPS) - …
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X-Ray Photoelectron Spectroscopy (XPS) - …
Electron Spectroscopy for Chemical Analysis (ESCA) X-Ray PhotoelectronSpectroscopy (XPS)Louis ~scudiero; 5-2669 The basic principleof the photoelectric effect was enunciated by Einstein [1] in 1905E = h There is a threshold in frequency below which light, regardless of intensity, fails to eject electrons from a metallic surface. h c> e mWhere h - Planck constant ( x 10-34 J s ), frequency (Hz) of the radiation and m work function In Photoelectron Spectroscopy such XPS, Auger and UPS, the photon energies range from 20 -1500 eV (even higher in the case of Auger, up to 10,000eV) much greater than any typical work function values (2-5 eV). In these techniques, the kinetic energy distribution of the emitted photoelectrons ( the number of emitted electrons as a function of their kinetic energy) can be measured using any appropriate electron energy analyzer and a Photoelectron spectrum can thus be recorded.
In photoelectron spectroscopy such XPS, Auger and UPS, the photon energies range from 20 -1500 eV (even higher in the case of Auger, up to 10,000eV) much greater than any typical work function values (2-5 eV).
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