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Proceedings Paper

Adsorbate-induced reflectivity changes in the visible region on a metal surface
Author(s): Joseph Dvorak; Eric Borguet; Hai-Lung Dai
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Paper Abstract

The reflectivity change induced by adsorbates on Cu(100) at (lambda) equals 632.8 nm is investigated. It is found that physisorbed molecules (water, methanol, acetone) induce no observable reflectivity change, while chemisorbed molecules (carbon monoxide, oxygen, acetylene) do. The magnitude of the reflectivity change is such that submonolayer sensitivity is obtained for chemisorbed species. Furthermore, the change is found to vary linearly with coverage. The results show that this technique is a versatile, inexpensive, and straightforward optical probe of the surface coverage, and as such is applicable to many different surface investigations.

Paper Details

Date Published: 25 September 1995
PDF: 10 pages
Proc. SPIE 2547, Laser Techniques for Surface Science II, (25 September 1995); doi: 10.1117/12.221507
Show Author Affiliations
Joseph Dvorak, Univ. of Pennsylvania (United States)
Eric Borguet, Univ. of Pennsylvania (United States)
Hai-Lung Dai, Univ. of Pennsylvania (United States)

Published in SPIE Proceedings Vol. 2547:
Laser Techniques for Surface Science II
Janice M. Hicks; Wilson Ho; Hai-Lung Dai, Editor(s)

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