Time-resolved SFG study of formate on a Ni( 1 1 1 ) surface under irradiation of picosecond laser pulses

H. Noguchi, T. Okada, K. Onda, S. S. Kano, A. Wada, K. Domen

Research output: Contribution to journalConference article

7 Citations (Scopus)

Abstract

Time-resolved sum-frequency generation spectroscopy was carried out on a deuterated formate (DCOO) adsorbed on Ni(1 1 1) surface to investigate the surface reaction dynamics under instantaneous surface temperature jump induced by the irradiation by picosecond laser pulses. The irradiation of pump pulse (800 nm) caused the rapid intensity decrease of both CD and OCO stretching modes of bridged formate on Ni(1 1 1). Different temporal behaviors of intensity recovery between these two vibrational modes were observed, i.e., CD stretching mode recovered faster than OCO. This is the first result to show that the dynamics of adsorbates on metals strongly depends on the observed vibrational mode. From the results of temperature and pump fluence dependence, we concluded that the observed intensity change was not due to the decomposition or desorption, but was induced by a non-thermal process.

Original languageEnglish
Pages (from-to)183-188
Number of pages6
JournalSurface Science
Volume528
Issue number1-3
DOIs
Publication statusPublished - Mar 20 2003
Externally publishedYes
EventDIET -9 - Aussois, France
Duration: Jun 1 2002Jun 4 2002

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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