Electrostatic Friction Force on an AFM probe Moving Near a Sample Surface

TL;DR

This paper derives formulas for electrostatic friction and attraction forces on an AFM probe moving near a surface, providing numerical analysis and comparison with existing experimental and theoretical data.

Contribution

It introduces general formulas for electrostatic friction and normal forces on a probe, extending nonrelativistic electrodynamics to this context.

Findings

Formulas for electrostatic friction and attraction forces derived.

Numerical example for metal probe and surface analyzed.

Results compared with existing experimental and theoretical data.

Abstract

Within the framework of nonrelativistic electrodynamics, general formulas have been obtained for the tangential dissipative force of electrostatic friction and the normal force of attraction to the surface of an axially symmetric probe moving parallel to the smooth surface of homogeneous materials or coated with thin films substrates with various combinations of materials. As a numerical example, the interaction of a metal ball moving above a metal surface has been studied. The results of the calculations are compared with the available experimental and theoretical results of other authors.