Amplitude response of single-wall carbon nanotube probes during tapping mode atomic force microscopy: Modeling and experiment

被引：20

作者：

Kutana, A. ^{[1
]}

Giapis, K. P. ^{[1
]}

Chen, J. Y. ^{[1
]}

Collier, C. P. ^{[1
]}

机构：

[1] CALTECH, Div Chem & Chem Engn, Pasadena, CA 91125 USA

来源：

NANO LETTERS | 2006年 / 6卷 / 08期

关键词：

D O I：

10.1021/nl060831o

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Imaging of surfaces with carbon nanotube probes in tapping mode results frequently in complex behavior in the amplitude - distance curves monitored. Using molecular mechanics simulations, we calculate the force exerted on a nanotube pressed against a smooth surface as it undergoes deformation and buckling. This nonlinear force is then used in a macroscopic equation, describing the response of a damped harmonic oscillator, to predict the amplitude response of a nanotube AFM probe. Similarities between the prediction and experiment suggest that the complex amplitude response seen in the experiment may be explained by the nonlinearity in the force exerted on the nanotube and thus must not necessarily be related to the structure of the surface.

引用

页码：1669 / 1673

页数：5

共 22 条

[1] A second-generation reactive empirical bond order (REBO) potential energy expression for hydrocarbons [J].