A structural study of the interaction of methanethiol with Pt(111) using X-ray standing waves
Lee, J. J., Fisher, C. J., Bittencourt, C., Woodruff, D. P., Chan, A. S. Y. and Jones, R. G.. (2002) A structural study of the interaction of methanethiol with Pt(111) using X-ray standing waves. Surface Science, 516 (1-2). pp. 1-15. ISSN 0039-6028Full text not available from this repository.
Official URL: http://dx.doi.org/10.1016/S0039-6028(02)02038-1
In combination with surface characterisation by synchrotron radiation X-ray photoelectron spectroscopy, the normal incidence X-ray standing wave (NIXSW) technique has been applied to a determination of the structure of surface phases formed on Pt(1 1 1) by reaction with methanethiol. On surfaces heated to > approximate to500 K, producing only coadsorbed atomic S and C, the S atoms are found to occupy fcc hollow sites (directly above Pt atoms in the third layer) in a geometry essentially identical to that of simple ordered S overlayer phases on Pt(1 1 1) with a S-Pt layer spacing of 1.67 Angstrom, but with possible fractional co-occupation of a complex S phase. On a surface annealed to approximate to223 K only a surface methanethiolate (CH3S-) species is believed to be present, the favoured model involves a tilted off-atop bonding such that the S atoms are located offset from the fcc hollow sites, with frustrated rotational vibrations of large amplitude, although an alternative model based on co-occupation of atop and fcc hollow sites is also consistent with the NIXSW data. (C) 2002 Elsevier Science B.V. All rights reserved.
|Item Type:||Journal Article|
|Subjects:||Q Science > QD Chemistry
Q Science > QC Physics
|Divisions:||Faculty of Science > Physics|
|Journal or Publication Title:||Surface Science|
|Publisher:||Elsevier Science BV|
|Date:||10 September 2002|
|Number of Pages:||15|
|Page Range:||pp. 1-15|
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