title: Calculation of the effect of tip geometry on noncontact atomic force microscopy using a qPlus sensor.
abstract: In qPlus atomic force microscopy the tip length can in principle approach the length of the cantilever. We present a detailed mathematical model of the effects this has on the dynamic properties of the qPlus sensor. The resulting, experimentally confirmed motion of the tip apex is shown to have a large lateral component, raising interesting questions for both calibration and force-spectroscopy measurements.
authors: School of Physics and Astronomy, The University of Nottingham, University Park, Nottingham, NG7 2RD, United Kingdom.
authors: Julian
authors: J
authors: Stirling
authors: Gordon A
authors: GA
authors: Shaw
keywords: atomic force microscopy; force spectroscopy; lateral forces; mechanical vibrations; qPlus
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