Dynamics of the C-O Stretch Vibration on Si(100).
The dynamics of the internal stretch vibration of CO adsorbed on Si(1 0 0) has been explored using sum frequency generation (SFG) spectroscopy adopting an IR pump-SFG probe approach. For the satd. surface the vibrational population decays with a characteristic time of 2.3 ± 0.5 ns. The substrate carrier d. proved to be of negligible importance. For ¹³CO the same decay time was found. For a surface with mixed isotopomers, a shorter decay time has been obsd., as also for a partly satd. surface.
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