First-order corrections in modulated molecular beam desorption experiments

B. J. Hinch, L. H. Dubois

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

Rate constants for the desorption of molecules from surfaces can be readily measured using a combination of molecular-beam techniques and a surface-sensitive coverage probe such as time-resolved high-resolution electron-energy-loss spectroscopy (TREELS). The coverage dependence of the desorption rate is determined by establishing a steady-state coverage and then perturbing this equilibrium slightly with a pulsed or chopped molecular beam. This paper demonstrates that the correct interpretation of these measurements must take into account the influence of the modulation on the steady-state adsorbate concentration. This approach is used to analyze TREELS data for the desorption of CO from Cu(111).

Original languageEnglish (US)
Pages (from-to)131-135
Number of pages5
JournalChemical Physics Letters
Volume171
Issue number1-2
DOIs
StatePublished - Jul 27 1990
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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