Molecular vibrational energy relaxation at a metal surface: Methyl thiolate on Ag(111)

Alex Harris, L. Rothberg, L. H. Dubois, N. J. Levinos, L. Dhar

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The lifetime of the first excited level of the symmetric C-H stretching mode of CH3S chemisorbed on a Ag(111) surface was measured by picosecond vibrational spectroscopy. A biexponential decay (3- and 63-ps lifetimes at 300 K) was observed, with a substantial temperature dependence of the slow component. Both decay processes are assigned to intramolecular vibrational relaxation. The decay rates are 2 orders of magnitude too fast to be explained by electron-hole-pair damping by the metal substrate.

Original languageEnglish
Pages (from-to)2086-2089
Number of pages4
JournalPhysical Review Letters
Issue number17
Publication statusPublished - 1990


ASJC Scopus subject areas

  • Physics and Astronomy(all)

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