Calibration of colloid probe cantilevers using the dynamic viscous response of a confined liquid
Date
2003-09
Authors
Notley, Shannon
Biggs, Simon
Craig, Vincent S. J.
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American Institute of Physics
Abstract
A method is described to determine the spring constant of colloid probe cantilevers used in force measurements with the atomic force microscope. An oscillatory drive applied to the substrate is coupled by viscous interactions to the colloid probe. The dynamic response of the probe, which is unaffected by static interactions, is then used to determine the spring constant of the cantilever. Thus an accurate calibration of the spring constant may be performed simultaneously with a normal colloidal probe force measurementin situ.
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Keywords: Atomic force microscopy; Drag; Dynamic response; Force measurement; Hydrodynamics; Probes; Viscosity; Colloid probe cantilevers; Colloids
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Source
Review of Scientific Instruments
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Journal article
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