Surface EXAFS on Low-Z Elements

  • K. Baberschke
Conference paper
Part of the Springer Series in Surface Sciences book series (SSSUR, volume 11)

Abstract

Only during the past 12 months has the first surface EXAFS at the carbon and nitrogen K-edge been reported. These experiments, in conjunction with oxygen data, will be discussed. All 3 atoms were adsorbed on Cu and Ni surfaces at 1/2 monolayer coverage. Precise and systematic nearest neighbor bond lengths have been determined. These data in combination with LEED experiments gave a detailed view into the local bonding geometry and the effect of chemically induced reconstruction. Recent Sexafs experiments on hydrocarbons C2H2 and C2H4/Cu (100) yield for the first time bond distances to the Cu-atoms. Also a stretching of the C-C distance was observed. Finally we present more advanced effects in the Sexafs analysis: multiple scattering effects and the Debye-Waller factor in the Exafs amplitude.

Keywords

Anisotropy Hydrocarbon Acetylene Chemisorption Aniso 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    J. Stöhr, in X-ray Absorption: Principles, Applications, Techniques of EXAFS, SEXAFS and XANES, edited by R. Prins and D. Koningsberger (Wiley, New York, 1987)Google Scholar
  2. 2.
    P.H. Citrin, J. Phys. (Paris) 47, C8–437 (1986)CrossRefGoogle Scholar
  3. 3.
    D. Norman, J. Phys. C 19, 3273 (1986)CrossRefGoogle Scholar
  4. 4.
    J. Stöhr, R. Jaeger, T. Kendelewicz; Phys. Rev. Lett. 40, 142 (1982) and J. Stöhr, private communicationCrossRefGoogle Scholar
  5. 5.
    K. Baberschke, U. Döbler, L. Wenzel, D. Arvanitis, A. Baratoff, K.H. Rieder; Phys. Rev. B33, 5910 (1986)Google Scholar
  6. 6.
    D. Arvanitis, K. Baberschke, L. Wenzel, U. Döbler, Phys. Rev. Lett. 57, 3175 (1986).CrossRefGoogle Scholar
  7. 7.
    M. Bader, C. Ocal, B. Hillert, J. Haase, A.M. Bradshaw; Phys. Rev. B35, 5900 (1987)Google Scholar
  8. 8.
    L. Wenzel, D. Arvanitis, W. Daum, H.H. Rotermund, J. Stöhr, K. Baberschke, H. Ibach, submitted for publication.Google Scholar
  9. 9.
    J.E. Demuth, N.J. DiNardo, G.S. Cargill; Phys. Rev. Lett. 50, 1373 (1983)CrossRefGoogle Scholar
  10. 10.
    D. Arvanitis, K. Baberschke, L. Wenzel, U. Dobler, Phys. Rev. Lett. 57, 3175 (1986).CrossRefGoogle Scholar
  11. 11.
    D. Arvanitis, L. Wenzel, K. Baberschke, submitted for publicationGoogle Scholar
  12. 12.
    J.J. Boland, S.E. Crane, J.D. Baldeschwieler; J. Chem. Phys. 77, 142 (1982)CrossRefGoogle Scholar
  13. 13.
    M. Bader, A. Puschmann, C. Ocal, J. Haase; Phys. Rev. Lett. 57, 3273 (1986)CrossRefGoogle Scholar
  14. 14.
    P.E. Lee, P.H. Citrin, P. Eisenberger, B.M. Kincaid; Rev. Mod. Phys. 53, 769 (1981)CrossRefGoogle Scholar
  15. 15.
    D. Chandesris; J. Phys. (Paris) 47, C8–479 (1986) and ref. thereinCrossRefGoogle Scholar
  16. 16.
    R. Biswas, D.R. Hamann; Phys. Rev. Lett. 56, 2291 (1986)CrossRefGoogle Scholar
  17. 17.
    D.A. Fischer, U. Döbler, D. Arvanitis, L. Wenzel, K. Baberschke, and J. Stöhr, Surf. Sci. 177, 114 (1986) and J. Phys. (Paris) 47, C8–173 (1986)CrossRefGoogle Scholar
  18. 18.
    D.D. Vvedensky, J.B. Pendry, U. Döbler, K. Baberschke; Phys. Rev. 35, 7756 (1987)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1988

Authors and Affiliations

  • K. Baberschke
    • 1
  1. 1.Institut für Atom-und FestkörperphysikFreie Universität BerlinBerlin 33Germany

Personalised recommendations