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Proceedings Paper

Temporally and spatially resolved linear optical probe of adsorption and reaction on a metal surface
Author(s): Joseph Dvorak; Hai-Lung Dai
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Paper Abstract

We demonstrate the se of an optical differential reflectivity technique to measure the rate of a surface reaction. The technique can be easily extended to a temporal resolution of nanoseconds and a spatial resolution of micrometers . The technique is used to study the reactions of acetylene on Cu(100). In the limit of low coverage acetylene undergoes two reactions: the first channel is desorption and the second channel is isomerization to vinylidene, which remains irreversibly bound to the surface. The rates of both the desorption and isomerization reactions have been measured. The desorption rates are in quantitative agreement with the predictions of transition state theory; the isomerization rates are in qualitative agreement.

Paper Details

Date Published: 30 April 1998
PDF: 9 pages
Proc. SPIE 3272, Laser Techniques for Surface Science III, (30 April 1998); doi: 10.1117/12.307146
Show Author Affiliations
Joseph Dvorak, Univ. of Pennsylvania (United States)
Hai-Lung Dai, Univ. of Pennsylvania (United States)

Published in SPIE Proceedings Vol. 3272:
Laser Techniques for Surface Science III
Hai-Lung Dai; Hans-Joachim Freund, Editor(s)

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