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Proceedings Paper

Transient IR and visible laser absorption-reflection spectroscopic studies of interadsorbate and adsorbate/substrate interactions
Author(s): Eric Borguet; Joseph Dvorak; Hai-Lung Dai
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Paper Abstract

Transient IR reflection-absorption spectroscopy with diode lasers has been used to characterize the adsorption kinetics and the nature of the bonding of CO on Cu(100). Although the strong dynamic dipole coupling between the CO molecules adversely affect the absorption intensity and frequency, it can be used to reveal the interadsorbate interactions. It was found that the adsorption of CO on Cu is correlated, resulting from a repulsive interaction between the first and second nearest neighboring sites. A model based on static screening of the charge transferred from CO to Cu is proposed to account for all the observations. Furthermore, a nonresonant reflectivity change, which results only from chemisorption, but not physisorption, was identified in both the IR and visible regions.

Paper Details

Date Published: 21 July 1994
PDF: 7 pages
Proc. SPIE 2125, Laser Techniques for Surface Science, (21 July 1994); doi: 10.1117/12.180845
Show Author Affiliations
Eric Borguet, Univ. of Pennsylvania (United States)
Joseph Dvorak, Univ. of Pennsylvania (United States)
Hai-Lung Dai, Univ. of Pennsylvania (United States)

Published in SPIE Proceedings Vol. 2125:
Laser Techniques for Surface Science
Hai-Lung Dai; Steven J. Sibener, Editor(s)

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