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Proceedings Paper

Oxygen photochemistry on Pt(111)
Author(s): Ian A. Harrison; Vladimir A. Ukraintsev; Alexander N. Artsyukhovich
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Paper Abstract

The 308 nm laser induced photodesorption of physisorbed and chemisorbed O2 on Pt(111) has been examined. Photodesorption of physisorbed O2 occurred with 9 X 10-20 cm2 cross section, and exhibited a sharp approximately cos34$ angular distribution and a structured O2 translational energy distribution, P(delta )(E(Tau )), which extended to E(Tau )equals1.2 eV. In contrast, photodesorption of chemisorbed O2 occurred with 1.8 X 10-20 cm(superscript 2 cross section, and exhibited a broad approximately cos$ angular distribution and a O2P(delta )(E(Tau )) which extended to only E(Tau )equals0.8 eV. Photodesorption mechanisms involving photoexcitation of substrate electrons are discussed.

Paper Details

Date Published: 21 July 1994
PDF: 11 pages
Proc. SPIE 2125, Laser Techniques for Surface Science, (21 July 1994); doi: 10.1117/12.180853
Show Author Affiliations
Ian A. Harrison, Univ. of Virginia (United States)
Vladimir A. Ukraintsev, Univ. of Virginia (United States)
Alexander N. Artsyukhovich, Univ. of Virginia (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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