Electron stimulated desorption from CO chemisorbed on Pt(111): A dynamical study of positive ion and metastable CO emission

The desorption by electron impact of significant quantities of electronically excited neutral species, CO ∗, from CO adsorbed on Pt(111) has been discovered. Comparison of the yield of this species as a function of electron energy, coverage, and temperature, with the yield of O + and C0 + has led to...

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Bibliographic Details
Published in:Surface science 1988-08, Vol.202 (3), p.L559-L567
Main Authors: Kiskinova, M., Szabo, A., Lanzillotto, A.-M., Yates, J.T.
Format: Article
Language:English
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Summary:The desorption by electron impact of significant quantities of electronically excited neutral species, CO ∗, from CO adsorbed on Pt(111) has been discovered. Comparison of the yield of this species as a function of electron energy, coverage, and temperature, with the yield of O + and C0 + has led to the conclusion that the CO ∗ species is mainly produced by direct excitation. Studies of the angular distribution of the three ESD-derived species have been made as a function of temperature, and high amplitude bending vibrational modes are observed. Isotope effects in the three desorption channels have been measured.
ISSN:0039-6028
1879-2758
DOI:10.1016/0039-6028(88)90032-5