Accelerated Molecular Dynamics Simulation of AFM Experiments Using the Bond-Boost Method
Keyword(s):
ABSTRACTAccelerated molecular dynamics (MD) simulations of recent Atomic Force Microscope (AFM) experiments on oxidized silicon surfaces demonstrate a nontrivial dependence of frictional force on sliding velocity as well as temperature. By implementing hyper dynamics (HD) via the bond-boost method these simulations achieve sliding velocities in the range of real experimental values. Moreover, an analysis of the effects of temperature and sliding velocity on friction provide evidence for a systematic deviation from the modified Tomlinson model. We hypothesize regarding the origin of these deviations, and use the simulations to analyze the atomic processes that accompany sliding.
2019 ◽
Vol 33
(10)
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pp. 1950088
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2006 ◽
Vol 125
(18)
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pp. 184706
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