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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 tipsample 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...
Aplot of the force interaction between atip and asurface as afunction of their separation constitutes aforce curve which is like afingerprint identifying aparticular physical system, its characteristics dependent on the nature of the tip and sample and the potential between them. Unfortunately, if the tip is mounted on acompliant cantilever for high force sensitivity, then at some point it will snap...