Femtosecond Surface Vibrational Spectroscopy of CO Adsorbed on Ru(001) during Desorption

Mischa Bonn, Christian Hess, Stephan Funk, James H. Miners, Bo N. J. Persson, Martin Wolf, and Gerhard Ertl
Phys. Rev. Lett. 84, 4653 – Published 15 May 2000
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Abstract

Using time-resolved sum-frequency generation spectroscopy, the CO stretch vibration of carbon monoxide adsorbed on a single-crystal Ru(001) surface is investigated during femtosecond near-IR laser excitation leading to desorption. A large transient redshift, a broadening of the resonance, and a strong decrease in intensity are observed. These originate from coupling of the CO stretch to low-frequency modes, especially the frustrated rotation, that are highly excited in the desorption process.

  • Received 9 December 1999

DOI:https://doi.org/10.1103/PhysRevLett.84.4653

©2000 American Physical Society

Authors & Affiliations

Mischa Bonn*, Christian Hess, Stephan Funk, James H. Miners, Bo N. J. Persson, Martin Wolf, and Gerhard Ertl

  • Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany

  • *Present address: Leiden Institute of Chemistry, P.O. Box 9502, 2300 RA Leiden, The Netherlands. Electronic address: m.bonn@chem.leidenuniv.nl
  • Permanent address: IFF, Forschungszentrum Jülich, D-52425 Jülich, Germany.

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Vol. 84, Iss. 20 — 15 May 2000

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