Journal
SCIENCE
Volume 310, Issue 5755, Pages 1790-1793Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1120693
Keywords
-
Categories
Ask authors/readers for more resources
The laser-induced movement of CO molecules over a platinum surface was followed in real time by means of ultrafast vibrational spectroscopy. Because the CO molecules bound on different surface sites exhibit different C-O stretch vibrational frequencies, the site-to-site hopping, triggered by excitation with a laser pulse, can be determined from subpicosecond changes in the vibrational spectra. The unexpectedly fast motion-characterized by a 500-femtosecond time constant-reveals that a rotational motion of the CO molecules, rather than pure translation, is required for this diffusion process. This conclusion is corroborated by density functional theory calculations.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available