Self-assembled monolayers of methylselenolate on the Au(111) surface: A combined STM and DFT study

被引：4

作者：

El-Kareh, L. ^{[1
]}

Mehring, P. ^{[1
]}

Caciuc, V. ^{[2
,3
,4
]}

Atodiresei, N. ^{[2
,3
,4
]}

Beimborn, A. ^{[1
]}

Bluegel, S. ^{[2
,3
,4
]}

Westphal, C. ^{[1
]}

机构：

[1] Tech Univ Dortmund, D-44221 Dortmund, Germany

[2] Forschungszentrum Julich, Peter Grunberg Inst PGI 1, D-52425 Julich, Germany

[3] Forschungszentrum Julich, Inst Adv Simulat IAS 1, D-52425 Julich, Germany

[4] JARA, D-52425 Julich, Germany

来源：

SURFACE SCIENCE | 2014年 / 619卷

关键词：

Self-assembled monolayers; Thiol; Selenide; Selenium; Sulphur; Scanning tunneling microcsopy; DEPOSITION; (CH3S)(2); PACKING; CHAIN; PHASE;

D O I：

10.1016/j.susc.2013.09.018

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this study scanning tunneling microscopy (STM) and density functional theory (DFT) were used to investigate the structural formation of methylselenolate (CH3Se) self-assembled monolayers (SAMs) on the Au(111) surface. SAMs were prepared by two different methods, from solution and by exposing the Au(111) surface to gaseous dimethyldiselenide (DMDSe). For methylselenolate (MSe) on the Au(111) surface, our STM measurements revealed the presence of (4 x root 3) and (3 x 2 root 3) rectangular striped phases. These structures were verified by DFT calculations. For both phases, the DFT calculations clearly found a bridge adsorption geometry for MSe on Au(111). Furthermore, they provide information about the electronic structure of the MSe-SAMs. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：67 / 70

页数：4

共 37 条

[21] Investigation of the adhesion, friction, and wear properties of biphenyl thiol self-assembled monolayers by atomic force microscopy [J].