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

被引：234

作者：

Yu, Miao

Bovet, N.

Satterley, Christopher J.

Bengio, S.

Lovelock, Kevin R. J.

Milligan, P. K.

Jones, Robert G.

Woodruff, D. P. ^{[1
]}

Dhanak, V.

机构：

[1] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

[2] Univ Nottingham, Dept Phys Chem, Sch Chem, Nottingham NG7 2RD, England

[3] UNLP, CONICET, INIFTA, RA-1900 La Plata, Argentina

[4] Univ Liverpool, Surface Sci Res Ctr, Warrington WA4 4AD, Cheshire, England

[5] Daresbury Lab, Warrington WA4 4AD, Cheshire, England

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.97.166102

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

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