21 July 1994 Oxygen photochemistry on Pt(111)
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Proceedings Volume 2125, Laser Techniques for Surface Science; (1994) https://doi.org/10.1117/12.180853
Event: OE/LASE '94, 1994, Los Angeles, CA, United States
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.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ian A. Harrison, Ian A. Harrison, Vladimir A. Ukraintsev, Vladimir A. Ukraintsev, Alexander N. Artsyukhovich, Alexander N. Artsyukhovich, } "Oxygen photochemistry on Pt(111)", Proc. SPIE 2125, Laser Techniques for Surface Science, (21 July 1994); doi: 10.1117/12.180853; https://doi.org/10.1117/12.180853
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