Analysis of Atomistic Friction Anisotropy by means of Molecular Dynamics Method

Abstract

To clarify the atomistic friction anisotropy, several 3-dimensional molecular dynamics (MD) simulations have been performed by using a simple model where the cantilever stiffness is taken into consideration. In this report, the surface observation or friction process is simulated on a well-defined Cu{100} surface in the directions of <100>, <110> and <210>. As a result, a friction map was proposed for Cu{100} surface measurement, and it was clarified that the friction coefficient can be classified by the types of the atomic-scale stick-slip phenomenon although it was much affected by the scan/sliding positions as well as the directions at an atomic-scale.