True nature of an archetypal self-assembly system: Mobile Au-thiolate species on Au(111)

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True nature of an archetypal self-assembly system: Mobile Au-thiolate species on Au(111)

Yu, M; Bovet, N; Satterley, CJ; Bengio, S; Lovelock, KRJ; Milligan, PK; Jones, RG; ... Dhanak, V; + view all (2006) True nature of an archetypal self-assembly system: Mobile Au-thiolate species on Au(111). PHYS REV LETT , 97 (16) , Article 166102. 10.1103/PhysRevLett.97.166102. Green open access

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Abstract

Alkanethiol self-assembled monolayer (SAM) phases on Au(111) have been assumed to involve direct S head group bonding to the substrate. Using x-ray standing wave experiments, we show the thiolate actually bonds to gold adatoms; self-organization in these archetypal SAM systems must therefore be governed by the movement of these Au-S-R moieties on the surface between two distinct local hollow sites on the surface. The results of recent ab initio total energy calculations provide strong support for this description, and a rationale for the implied significant molecular mobility in these systems.

Type:	Article
Title:	True nature of an archetypal self-assembly system: Mobile Au-thiolate species on Au(111)
Open access status:	An open access version is available from UCL Discovery
DOI:	10.1103/PhysRevLett.97.166102
Publisher version:	http://dx.doi.org/10.1103/PhysRevLett.97.166102
Language:	English
Additional information:	© 2006 The American Physical Society
Keywords:	DENSITY-FUNCTIONAL THEORY, MONOLAYERS, ADSORPTION, ALKANETHIOLS, SURFACE, GOLD, DYNAMICS, SULFUR, SITE
UCL classification:	UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
URI:	https://discovery.ucl.ac.uk/id/eprint/1311355