Measuring viscous dissipative interactions in dynamic force microscopy |
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| Authors: | U Dürig |
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| Institution: | (1) Institute of Physics, University of M?nster, Whilhem-Klemm-Stra?e 10, 48149 M?nster, Germany;(2) nanoAnalytics GmbH, Gievenbecker Weg 11, 48149 M?nster, Germany;(3) Physikalisches Institut, Universit?t M?nster, Wilhelm-Klemm-Stra?e 10, 48149 M?nster, Germany |
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| Abstract: | The periodic motion of a harmonic pendulum in an arbitrary force field including viscous damping is studied as it pertains to dynamic force microscopy. It is shown that the damping constant as a function of tip-sample distance and thus the dissipative force can be obtained unambiguously by measuring the driving-force amplitude versus displacement of the force sensor. This methodology provides the basis for quantitative force spectroscopy of dissipative interactions. |
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