Atomic force microscopy: loading position dependence of cantilever spring constants and detector sensitivity |
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Authors: | Vakarelski Ivan U Edwards Scott A Dagastine Raymond R Chan Derek Y C Stevens Geoffrey W Grieser Franz |
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Affiliation: | Particulate Fluids Processing Center, School of Chemistry, The University of Melbourne, Parkville, Victoria 3010, Australia. |
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Abstract: | A simple and accurate experimental method is described for determining the effective cantilever spring constant and the detector sensitivity of atomic force microscopy cantilevers on which a colloidal particle is attached. By attaching large (approximately 85 microm diameter) latex particles at various positions along the V-shaped cantilevers, we demonstrate how the normal and lateral spring constants as well as the sensitivity vary with loading position. Comparison with an explicit point-load theoretical model has also been used to verify the accuracy of the method. |
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