Transient IR and visible laser absorption-reflection spectroscopic studies of interadsorbate and adsorbate/substrate interactions

Eric Borguet; Joseph Dvorak; Hai-Lung Dai

doi:10.1117/12.180845

21 July 1994 Transient IR and visible laser absorption-reflection spectroscopic studies of interadsorbate and adsorbate/substrate interactions

Eric Borguet, Joseph Dvorak, Hai-Lung Dai

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Proceedings Volume 2125, Laser Techniques for Surface Science; (1994) https://doi.org/10.1117/12.180845
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

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.

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Eric Borguet, Joseph Dvorak, and Hai-Lung Dai "Transient IR and visible laser absorption-reflection spectroscopic studies of interadsorbate and adsorbate/substrate interactions", Proc. SPIE 2125, Laser Techniques for Surface Science, (21 July 1994); https://doi.org/10.1117/12.180845

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