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The local adsorption site of methylthiolate on Au(1 1 1): Bridge or atop?

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Jackson, D. C., Chaudhuri, Anindita, Lerotholi, T. J., Woodruff, D. P., Jones, R. G. and Dhanak, Vin. (2009) The local adsorption site of methylthiolate on Au(1 1 1): Bridge or atop? Surface Science, Vol.603 (No.5). pp. 807-813. ISSN 0039-6028

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Abstract

Measurements of the local adsorption geometry of the S head-group atom in the Au(1 1 1)(√3 × √3)R30°–CH3S surface have been made using normal incidence X-ray standing waves (NIXSW) and S 1s scanned-energy mode photoelectron diffraction on the same surface preparations. The results confirm that the local adsorption site is atop an Au atom in a bulk-continuation site with a S–Au bondlength of 2.42 ± 0.02 Å, and that there can be no significant fraction of coadsorbed bridging species as recently proposed in a combined molecular dynamics/experimental study by Mazzarello et al. [R. Mazzarello, A. Cossaro, A. Verdini, R. Rousseau, L. Casalis, M.F. Danisman, L. Floreano, S. Scandolo, A. Morgante, G. Scoles, Phys. Rev. Lett. 98 (2007) 016102]. The results do not, however, clearly distinguish the different local reconstruction (adatom) models proposed for this surface.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Photoelectron spectroscopy -- Research, X-rays -- Diffraction, Adsorption -- Research, Chemisorption -- Research, Self-assembly (Chemistry)
Journal or Publication Title: Surface Science
Publisher: Elsevier BV
ISSN: 0039-6028
Official Date: 1 March 2009
Volume: Vol.603
Number: No.5
Page Range: pp. 807-813
Identification Number: 10.1016/j.susc.2009.01.022
Status: Peer Reviewed
Access rights to Published version: Open Access
Funder: Engineering and Physical Sciences Research Council (EPSRC)
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URI: http://wrap.warwick.ac.uk/id/eprint/2726

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