ADSORPTION-INDUCED SURFACE STRESS AND ITS EFFECTS ON RESONANCE FREQUENCY OF MICROCANTILEVERS

被引：473

作者：

CHEN, GY

THUNDAT, T

WACHTER, EA

WARMACK, RJ

机构：

[1] Health Sciences Research Division, Oak Ridge National Laboratory, Oak Ridge

来源：

JOURNAL OF APPLIED PHYSICS | 1995年 / 77卷 / 08期

关键词：

D O I：

10.1063/1.359562

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

It is well known that bimetallic microcantilevers can exhibit static deflection as a result of thermal effects, including exothermic adsorption of chemicals on their surfaces. It is shown here that the resonance frequency of a cantilever can change due to a combination of mass loading and change of spring constant resulting from adsorption of chemicals on the surface. Cantilevers also undergo static bending that is induced by differential surface stress. The magnitude of these effects depends upon the chemical properties of the surface and upon the amount of material adsorbed. Hence cantilever deflection as well as resonance frequency change can be used as the basis for development of novel chemical sensors. © 1995 American Institute of Physics.

引用

页码：3618 / 3622

页数：5

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