Surface stress effects on the resonance properties of cantilever sensors
- 1 August 2005
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 72 (8), 085405
- https://doi.org/10.1103/physrevb.72.085405
Abstract
The effect of surface stress on the resonance frequency of a cantilever sensor is modeled analytically by incorporating strain-dependent surface stress terms into the equations of motion. This mechanistic approach can be equated with a corresponding thermodynamic description, allowing basic equations to be derived that link the analysis to experimentally determined parameters. Examples are shown for the cases of a pure surface stress and an adsorption-induced surface stress, and indicate that frequency measurements may be useful for fundamental understanding of surface and adsorption-induced stresses on metals, semiconductors, and nanoscale structures. Application to biomolecular adsorption sensors appears unlikely.Keywords
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