Temporally and spatially resolved linear optical probe of adsorption and reaction on a metal surface

Joseph Dvorak; Hai-Lung Dai

doi:10.1117/12.307146

30 April 1998 Temporally and spatially resolved linear optical probe of adsorption and reaction on a metal surface

Joseph Dvorak, Hai-Lung Dai

Proceedings Volume 3272, Laser Techniques for Surface Science III; (1998) https://doi.org/10.1117/12.307146
Event: Optoelectronics and High-Power Lasers and Applications, 1998, San Jose, CA, United States

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.

Citation Download Citation

Joseph Dvorak and Hai-Lung Dai "Temporally and spatially resolved linear optical probe of adsorption and reaction on a metal surface", Proc. SPIE 3272, Laser Techniques for Surface Science III, (30 April 1998); https://doi.org/10.1117/12.307146

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