Noncontact friction and force fluctuations between closely spaced bodies

被引：215

作者：

Stipe, BC

Mamin, HJ

Stowe, TD

Kenny, TW

Rugar, D

机构：

[1] IBM Corp, Almaden Res Ctr, Div Res, San Jose, CA 95120 USA

[2] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA

[3] Stanford Univ, Dept Mech Engn, Stanford, CA 94305 USA

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 09期

关键词：

D O I：

10.1103/PhysRevLett.87.096801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Noncontact friction between a Au(111) surface and an ultrasensitive gold-coated cantilever wag measured as a function of tip-sample spacing, temperature, and bias voltage using observations of cantilever damping and Brownian motion. The importance of the inhomogeneous contact potential is discussed and comparison is made to measurements over dielectric surfaces. Using the fluctuation-dissipation theorem, the force fluctuations are interpreted in terms of near-surface fluctuating electric fields interacting with static surface charge.

引用

收藏

页码：968011 / 968014

页数：4

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