Torsional spring constant obtained for an atomic force microscope cantilever

被引：20

作者：

Jeon, S ^{[1
]}

Braiman, Y

Thundat, T

机构：

[1] Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA

[2] Oak Ridge Natl Lab, Div Life Sci, Oak Ridge, TN 37831 USA

来源：

APPLIED PHYSICS LETTERS | 2004年 / 84卷 / 10期

关键词：

D O I：

10.1063/1.1667000

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this letter, a method to measure the torsional spring constant of a microcantilever is described. The cantilever was twisted laterally without any normal load by inducing the Lorentz force. An electrical current was applied to the cantilever in a magnetic field, and the torsional resonance frequency of the cantilever was obtained. Based on the observation that the torsional resonance frequency is the same as the second resonance peak of the thermally vibrating cantilever, the ratio of deflection spring constant to torsional spring constant is easily obtained from a simple relationship. For the cantilever used here, the torsional spring constant is 11.24 N/m, 28 times greater than the deflection spring constant. (C) 2004 American Institute of Physics.

引用

页码：1795 / 1797

页数：3

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