Skip to main content
Article
Reinterpretation of Velocity-dependent Atomic Friction: Influence of the Inherent Instrumental Noise in Friction Force Microscopes
Physical Review E
  • Yalin Dong, The University of Akron, Main Campus
  • Hongyu Gao
  • Ashlie Martini
  • Philip Egberts
Document Type
Article
Publication Date
7-23-2014
Abstract
We have applied both the master equation method and harmonic transition state theory to interpret the velocity-dependent friction behavior observed in atomic friction experiments. To understand the discrepancy between attempt frequencies measured in atomic force microscopy experiments and those estimated by theoretical models, both thermal noise and instrumental noise are introduced into the model. It is found that the experimentally observed low attempt frequency and the transition point at low velocity regimes can be interpreted in terms of the instrumental noise inherent in atomic force microscopy. In contrast to previous models, this model also predicts (1) the existence of a two-slope curve of velocity dependence and (2) the decrease of critical velocity with temperature, which provides clues for further experimental verification of the influence of instrumental noise in friction measurements.
Citation Information
Yalin Dong, Hongyu Gao, Ashlie Martini and Philip Egberts. "Reinterpretation of Velocity-dependent Atomic Friction: Influence of the Inherent Instrumental Noise in Friction Force Microscopes" Physical Review E Vol. 90 Iss. 1 (2014) p. 12125
Available at: http://works.bepress.com/yalin_dong/17/