Realy not a good idea, if you have C on the surface, what C is it ? CO, hydrocarbon, graphite ? All have a different binding energy of the C 1s ! I suggest, if youre sample is not to be supposed to contain C, you should clean it.
XPS energies have to be calibrated using the Au (or Ag) Fermi energy !!!!! and the other question: And for an insulator when the extra 1/2 (or 1) electron goes into the conduction band and E_F changes....? An insulater will most probably charge if you do XPS, and the energies do not tell you much. Ciao Gerhard ________________________________________ Von: wien-bounces at zeus.theochem.tuwien.ac.at [wien-bounces at zeus.theochem.tuwien.ac.at] im Auftrag von Laurence Marks [L-marks at northwestern.edu] Gesendet: Mittwoch, 17. September 2008 18:06 An: A Mailing list for WIEN2k users Betreff: Re: [Wien] Calculating XPS spectra in Wien2k Good point, we do use the C 1s peak for calibration. On Wed, Sep 17, 2008 at 8:56 AM, Pierre-Emmanuel Lippens <lippens at univ-montp2.fr> wrote: > At 14:20 17/09/2008, you wrote: >>It should be EF. I think experimentally binding energies in XPS are >>given with respect >>to EF=0. > > Yes, but the experimental energy scale is often calibrated by > considering the C 1s peak (fixed at about 285 eV). This peak is used > because of the carbon contamination usually observed in XPS experiments. > > PE Lippens > > > _______________________________________________ > Wien mailing list > Wien at zeus.theochem.tuwien.ac.at > http://zeus.theochem.tuwien.ac.at/mailman/listinfo/wien > -- Laurence Marks Department of Materials Science and Engineering MSE Rm 2036 Cook Hall 2220 N Campus Drive Northwestern University Evanston, IL 60208, USA Tel: (847) 491-3996 Fax: (847) 491-7820 email: L-marks at northwestern dot edu Web: www.numis.northwestern.edu Chair, Commission on Electron Crystallography of IUCR www.numis.northwestern.edu/IUCR_CED _______________________________________________ Wien mailing list Wien at zeus.theochem.tuwien.ac.at http://zeus.theochem.tuwien.ac.at/mailman/listinfo/wien
