VEDA – Virtual Environment for Dynamic AFM
http://www.nanohub.org/tools/dynamicafm
Dynamic Approach Curves is the premier tool of a suite of tools being developed under the title of VEDA – Virtual Environment for Dynamic AFM. This tool accurately simulates the oscillations and tip-sample interaction forces of an AFM cantilever probe excited near resonance and brought close to a sample in either ambient conditions or ultra high vacuum. This tool features (a) accurate models of AFM probe dynamics, (b) realistic tip-sample interaction force models and (c) accurate, FORTRAN based, numerical integration schemes that are well-suited for non-smooth, nonlinear differential equations. From the tip oscillation time histories, which are simulated with a relative tolerance of 1e-9, quantities such as amplitude and phase of the first harmonic, peak interaction force, mean interaction force, and power dissipation are calculated.
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