Frictional Duality Observed during Nanoparticle Sliding
Materials Science
2009-11-13 v2 Other Condensed Matter
Abstract
One of the most fundamental questions in tribology concerns the area dependence of friction at the nanoscale. Here, experiments are presented where the frictional resistance of nanoparticles is measured by pushing them with the tip of an atomic force microscope. We find two coexisting frictional states: While some particles show finite friction increasing linearly with the interface areas of up to 310,000nm^2, other particles assume a state of frictionless sliding. The results further suggest a link between the degree of surface contamination and the occurrence of this duality.
Cite
@article{arxiv.0805.2448,
title = {Frictional Duality Observed during Nanoparticle Sliding},
author = {Dirk Dietzel and Claudia Ritter and Tristan Monninghoff and Harald Fuchs and Andre Schirmeisen and Udo D. Schwarz},
journal= {arXiv preprint arXiv:0805.2448},
year = {2009}
}
Comments
revised version