Role of the adhesion between a nanotip and a soft material in tapping mode AFM

被引：23

作者：

Dubourg, F ^{[1
]}

Aimé, JP ^{[1
]}

机构：

[1] Univ Bordeaux 1, CPMOH, F-33405 Talence, France

来源：

SURFACE SCIENCE | 2000年 / 466卷 / 1-3期

关键词：

adhesion; atomic force microscopy; curved surfaces; models of non-linear phenomena;

D O I：

10.1016/S0039-6028(00)00749-4

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The present work investigates the role of the adhesion in the oscillation behavior of a tip cantilever system when soft materials are studied. To do so, the attractive interaction between a sphere and a concave surface is calculated with the aim of predicting the change in adhesion with indentation depth. The net result is an increase in adhesion as a function of the indentation depth. Then, the adhesion expression is included in equations describing intermittent contact situations. The computed variation of the oscillation amplitude differs significantly from that obtained when uniquely a sphere-plane interaction is considered. The predicted behavior is in good agreement, particularly at the bifurcation spot, with experimental results obtained on soft materials. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：137 / 143

页数：7

共 29 条

[1] Growth kinetics of a nanoprotuberance under the action of an oscillating nanotip [J].