Study of the dynamics of surface molecules by time-resolved sum-frequency generation spectroscopy

Kubota, Jun; Domen, Kazunari
May 2007
Analytical & Bioanalytical Chemistry;May2007, Vol. 388 Issue 1, p17
Academic Journal
Sum-frequency generation (SFG) is a nonlinear laser-spectroscopy technique suitable for analysis of adsorbed molecules. The sub-monolayer sensitivity of SFG spectroscopy enables vibrational spectra to be obtained with high specificity for a variety of molecules on a range of surfaces, including metals, oxides, and semiconductors. The use of ultra-short laser pulses on time-scales of picoseconds also makes time-resolved measurements possible; this can reveal ultrafast transient changes in molecular arrangements. This article reviews recent time-resolved SFG spectroscopy studies revealing site-hopping of adsorbed CO on metal surfaces and the dynamics of energy relaxation at water/metal interfaces. [Figure not available: see fulltext.]


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