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Vibrational Relaxation Lifetime of a Physisorbed Molecule at a Metal Surface.

08:00 EDT 11th October 2019 | BioPortfolio

Summary of "Vibrational Relaxation Lifetime of a Physisorbed Molecule at a Metal Surface."

Previous measurements of vibrational relaxation lifetimes for molecules adsorbed at metal surfaces yielded values of 1-3 ps; however, only chemisorbed molecules have been studied. We report the first measurements of the vibrational relaxation lifetime of a molecule physisorbed to a metal surface. For CO(v=1) adsorbed on Au(111) at 35 K the vibrational lifetime of the excited stretching mode is 49±3  ps. The long lifetime seen here is likely to be a general feature of physisorption, which involves weaker electronic coupling between the adsorbate and the solid due to bonding at larger distances.

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This article was published in the following journal.

Name: Physical review letters
ISSN: 1079-7114
Pages: 156101

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