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Proceedings Paper

STM investigation of hot bromine atom chemistry on Pt(111)
Author(s): H. Xu; R. Yuro; Ian A. Harrison
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Paper Abstract

The corrosive adsorption of Br atoms on Pt(111) was studied by variable temperature STM, TPD, and AES. Photoinduced dissociative electron attachment to adsorbed CH3Br at 193 nm was used to dose hot Br anions onto the surface of 90 K. Br formed two ordered structures on Pt(111): (3 X 3) and ((root)3 X (root)3) R30 degree(s). STM images show that both structures coexist at intermediate coverages. Photofragmentation of CH3Br produced monovacancies on the Pt(111) surface which were attributed to abstractive attack by the hot Br anions. The initial monovacancy etching efficiency of the adsorbing Br anions was high, roughly 33%.

Paper Details

Date Published: 30 April 1998
PDF: 11 pages
Proc. SPIE 3272, Laser Techniques for Surface Science III, (30 April 1998); doi: 10.1117/12.307131
Show Author Affiliations
H. Xu, Univ. of Virginia (United States)
R. Yuro, Univ. of Virginia (United States)
Ian A. Harrison, Univ. of Virginia (United States)

Published in SPIE Proceedings Vol. 3272:
Laser Techniques for Surface Science III
Hai-Lung Dai; Hans-Joachim Freund, Editor(s)

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