Structural characterization and frictional properties of C60-terminated self-assembled monolayers on Au(111)

被引：41

作者：

Lee, SW ^{[1
]}

Shon, YS ^{[1
]}

Lee, TR ^{[1
]}

Perry, SS ^{[1
]}

机构：

[1] Univ Houston, Dept Chem, Houston, TX 77204 USA

来源：

THIN SOLID FILMS | 2000年 / 358卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

atomic force microscopy; fullerene; interfaces; tribology;

D O I：

10.1016/S0040-6090(99)00539-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

C-60-terminated self-assembled monolayers (SAMs) were generated on the surface of Au(111) by the adsorption of unsymmetrical disulfides having saturated hydrocarbon backbone structures comprised of six (C-6) and eleven (C-11) carbon atoms. The formation of oriented monolayer films from these adsorbates was confirmed by ellipsometric thickness and contact angle measurements. The morphologies and frictional properties of the C-60-terminated SAMs were examined using atomic force microscopy (AFM). The SAMs derived from the C-11 disulfides exhibited smooth morphologies and homogeneous frictional force distributions, which proved ideal for the study of intrinsic frictional properties. The SAMs derived from the C-6 disulfides, however, exhibited rough and inhomogeneous topographic and frictional force distributions. In addition, the shorter SAMs exhibited erratic frictional behavior and partial film delamination. The relative frictional forces observed on these immobilized C-60 films were higher than those observed on normal methyl-terminated SAMs and on the surface of graphite. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：152 / 158

页数：7

共 33 条

[31] ATOMIC-FORCE MICROSCOPE INVESTIGATION OF C-60 ADSORBED ON SILICON AND MICA [J].