Frictional duality observed during nanoparticle sliding

被引：161

作者：

Dietzel, Dirk ^{[1
,2
,3
]}

Ritter, Claudia ^{[4
,5
]}

Moenninghoff, Tristan ^{[1
,2
]}

Fuchs, Harald ^{[1
,2
,3
]}

Schirmeisen, Andre ^{[2
]}

Schwarz, Udo D. ^{[4
,5
]}

机构：

[1] Univ Munster, Inst Phys, D-4400 Munster, Germany

[2] Univ Munster, Ctr Nanotecnol, D-4400 Munster, Germany

[3] Forschungszentrum Karlsruhe, INT, D-76021 Karlsruhe, Germany

[4] Yale Univ, Dept Mech Engn, New Haven, CT 06520 USA

[5] Yale Univ, CRISP, New Haven, CT USA

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 12期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.101.125505

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

One of the most fundamental questions in tribology concerns the area dependence of friction at the nanoscale. Here, experiments are presented where the frictional resistance of nanoparticles is measured by pushing them with the tip of an atomic force microscope. We find two coexisting frictional states: While some particles show finite friction increasing linearly with the interface areas of up to 310 000 nm(2), other particles assume a state of frictionless sliding. The results further suggest a link between the degree of surface contamination and the occurrence of this duality.

引用

页数：4

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