The local adsorption site of methylthiolate on Au(1 1 1): Bridge or atop?
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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Official URL: http://dx.doi.org/10.1016/j.susc.2009.01.022
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|
|Official Date:||1 March 2009|
|Page Range:||pp. 807-813|
|Access rights to Published version:||Open Access|
|Funder:||Engineering and Physical Sciences Research Council (EPSRC)|
1 L. H. Dubois, R. G. Nuzzo, Annu. Rev. Phys. Chem. 43 (1992) 437.
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