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Lecture 7 X-ray Photoelectron Spectroscopy (XPS)

Physics 9826b February 11, 13, 2013 1 1 Lecture 7 X-ray Photoelectron Spectroscopy (XPS) 7. Photoemission Spectroscopy (XPS) Principles Interpretation Notations Electron workfunction chemical shifts Instrumentation XPS vs UV Photoelectron Spectroscopy (UPS) Auger Electron Spectroscopy (AES) Quantitative Analysis Appendix I: Workfunction Electron Emission References 2 1)Vickerman, Chapter 2 and 3 2)Zangwill; Chapter 2, pp. 20-24 and 4 3)Kolasinski, Chapter 4)Woodruff, and Delchar, Chapter 3 5)Briggs, Seah, Practical Surface Analysis. 1991; Vol. 1. 6)Luth, Chapter 6 Useful web-sites: 1) 2) 3) ~cem924sg/ Physics 9826b February 11, 13, 2013 2 3 Electron Spectroscopy for chemical Analysis Spectroscopy Particles involved Incident Energy What you learn XPS X-ray Photoelectron X-ray in e out 1-4 keV chemical state, composition UPS UV Photoelectron UV photon e out 5-500 eV Valence band AES Auger Electr

Chemical potential of electrons: Physics 9826b February 11, 13, 2013 6 11 Work Function ... (eV) Element (eV) Element (eV) ... Binding energy is more properly associated with ionization energy. In HF approach, Koopmans’ Theorem: E B = - thE k

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