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Proceedings Paper

UV Surface Photochemistry And Hot Electron Transfer
Author(s): James P Cowin; Eugene P Marsh; Wolfgang Meier; Terry L. Gilton; Mark R. Schneider
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Paper Abstract

Two different photolytic mechanisms were identified for CH3C1 on Ni(111). Direct photolysis and electron-induced fragmentation was observed in time of flight (TOF) studies using 193 nm radiation. At 248 nm only the electron induced channel was observed. Both mechanisms were strongly inhibited in the first 2 monolayers, due to electron transfer occurring on a 1 to 5 femtosecond time scale. The electron induced process was surface specific, occurring within a limited adsorbate thickness determined by the penetration depth of the excited substrate electrons into the adsorbate. Cross sections for the total photolytic removal of parent molecules are reported as a function of coverage.

Paper Details

Date Published: 15 August 1989
PDF: 10 pages
Proc. SPIE 1056, Photochemistry in Thin Films, (15 August 1989); doi: 10.1117/12.951628
Show Author Affiliations
James P Cowin, University of California (United States)
Eugene P Marsh, University of California (United States)
Wolfgang Meier, University of California (United States)
Terry L. Gilton, University of California (United States)
Mark R. Schneider, University of California (United States)

Published in SPIE Proceedings Vol. 1056:
Photochemistry in Thin Films
Thomas F. George, Editor(s)

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