Nano-scale friction of polystyrene in air and in vacuum

被引：19

作者：

Bistac, Sophie ^{[1
]}

Schmitt, Marjorie ^{[1
]}

Ghorbal, Achraf ^{[1
]}

Gnecco, Enrico ^{[2
,3
]}

Meyer, Ernst ^{[2
,3
]}

机构：

[1] Univ Haute Alsace, CNRS, F-68057 Mulhouse, France

[2] Univ Basel, NCCR Nanoscale Sci, CH-4056 Basel, Switzerland

[3] Univ Basel, Inst Phys, CH-4056 Basel, Switzerland

来源：

POLYMER | 2008年 / 49卷 / 17期

基金：

瑞士国家科学基金会;

关键词：

friction; AFM; polymer;

D O I：

10.1016/j.polymer.2008.06.032

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Using atomic force microscopy (AFM), we measured friction between an AFM tip and a polystyrene surface at 25 degrees C, as a function of the sliding velocity and the applied normal load, both in air and under vacuum conditions. The objective was to analyze the influence of humidity on the frictional behavior of polystyrene. Our experimental results as a function of sliding velocity revealed a logarithmic increase of the friction force in air whereas a logarithmic decrease of this force is found in vacuum. Our comparative results unveil that two different dissipation mechanisms are dominating the frictional behavior of polystyrene in air and in vacuum. We propose a tentative explanation. (c) 2008 Elsevier Ltd. All rights reserved.

引用

页码：3780 / 3784

页数：5

共 55 条

[1] TEMPERATURE MAPS FOR FRICTIONAL HEATING IN DRY SLIDING [J].