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The (2√3×3)rect. phase of alkylthiolate self-assembled monolayers on Au(111): a symmetry-constrained structural solution

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Chaudhuri, Anindita, Lerotholi, T. J., Jackson, D. C., Woodruff, D. P. and Jones, R. G.. (2009) The (2√3×3)rect. phase of alkylthiolate self-assembled monolayers on Au(111): a symmetry-constrained structural solution. Physical Review B (Condensed Matter and Materials Physics), Vol.79 (No.19). p. 5439. ISSN 1098-0121

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Official URL: http://dx.doi.org/10.1103/PhysRevB.79.195439

Abstract

Low-energy electron-diffraction (LEED) patterns of the Au(111)(2√3×3)rect.-butylthiolate surface phase (a structure also seen in longer alkane chain thiolate self-assembled monolayers) show missing diffracted beams characteristic of glide symmetry, but do not show the larger set of missing beams found in surface x-ray diffraction (SXRD). The difference can be attributed to the greatly enhanced role of multiple scattering in LEED, but the combination of symmetry constraints placed on possible structural models by the observed SXRD and LEED beam extinctions greatly reduces the number of possible structural models. Only three such models are identified, one of which is clearly incompatible with other published experimental data. The relative merits of the remaining models, both involving Au adatom-thiolate moieties, are discussed in the light of the results of previous experimental studies.

Item Type:	Journal Article
Subjects:	Q Science > QD Chemistry Q Science > QC Physics
Divisions:	Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	Photoelectron spectroscopy, Adsorption -- Research, X-ray photoelectron spectroscopy, Microfabrication -- Research, Thiols -- Research
Journal or Publication Title:	Physical Review B (Condensed Matter and Materials Physics)
Publisher:	American Physical Society
ISSN:	1098-0121
Official Date:	15 May 2009
Volume:	Vol.79
Number:	No.19
Page Range:	p. 5439
Identification Number:	10.1103/PhysRevB.79.195439
Status:	Peer Reviewed
Access rights to Published version:	Open Access
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URI:	http://wrap.warwick.ac.uk/id/eprint/2563