Nanofriction behavior of cluster-assembled carbon films

Details Nanofriction behavior of cluster-assembled carbon films Nanofriction behavior of cluster-assembled carbon films

2002-08-08

arxiv.org/abs/cond-mat/0208167v1

Physics

Condensed Matter

Materials Science

22 pages, 6 figures, RevTex4

Scientific paper

We have characterized the frictional properties of nanostructured (ns) carbon films grown by Supersonic Cluster Beam Deposition (SCBD) via an Atomic Force-Friction Force Microscope (AFM-FFM). The experimental data are discussed on the basis of a modified Amonton's law for friction, stating a linear dependence of friction on load plus an adhesive offset accounting for a finite friction force in the limit of null total applied load. Molecular Dynamics simulations of the interaction of the AFM tip with the nanostructured carbon confirm the validity of the friction model used for this system. Experimental results show that the friction coefficient is not influenced by the nanostructure of the films nor by the relative humidity. On the other hand the adhesion coefficient depends on these parameters.

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