Tribological properties of self-assembled monolayers of fluorocarbon and hydrocarbon thiols and disulfides on Au(111) studied by scanning force microscopy

被引：22

作者：

Schönherr, H ^{[1
]}

Vancso, GJ ^{[1
]}

机构：

[1] Univ Twente, Fac Chem Technol, NL-7500 AE Enschede, Netherlands

来源：

MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS | 1999年 / 8-9卷

关键词：

friction; scanning force microscopy; self-assembled monolayers;

D O I：

10.1016/S0928-4931(99)00041-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The tribological properties of highly ordered self-assembled monolayers (SAMs) of fluorocarbon and hydrocarbon thiols and disulfides formed on triangular Au(111) terraces were studied by scanning force microscopy (SFM). Molecular resolution SFM images proved the high degree of lateral order in the films. The magnitude of friction between Si3N4 tips and the monolayers measured by SFM was related to the order of the alkane chains. The disorder of the hydrocarbon chains in SAMs of mixed hydrocarbon - fluorocarbon disulfides, or short chain hydrocarbon disulfides, was determined by Fourier transfrom infrared (FTIR) spectroscopy. Conformational and structural disorder was found to correlate with a significant increase in the magnitude of friction. The correlation between disorder (transition from 'solid-like' to 'amorphous-like' monolayers) and increase in observed friction force can be interpreted based on models by Yoshizawa et al. [H, Yoshizawa, Y.-L. Chen, J. Israelachvili, J. Phys. Chem. 97 (1993) 4128]. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：243 / 249

页数：7

共 40 条

[1]

[Anonymous], FUNDAMENTALS ADHESIO

[2] Scanning force microscopy study of patterned monolayers of alkanethiols on gold. Importance of tip-sample contact area in interpreting force modulation and friction force microscopy images [J].