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Issue 20, 2011
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Amontonian frictional behaviour of nanostructured surfaces

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Abstract

With nanotextured surfaces and interfaces increasingly being encountered in technological and biomedical applications, there is a need for a better understanding of frictional properties involving such surfaces. Here we report friction measurements of several nanostructured surfaces using an Atomic Force Microscope (AFM). These nanostructured surfaces provide well defined model systems on which we have tested the applicability of Amontons' laws of friction. Our results show that Amontonian behaviour is observed with each of the surfaces studied. However, no correlation has been found between measured friction and various surface roughness parameters such as average surface roughness (Ra) and root mean squared (rms) roughness. Instead, we propose that the friction coefficient may be decomposed into two contributions, i.e., μ = μ0 + μg, with the intrinsic friction coefficient μ0 accounting for the chemical nature of the surfaces and the geometric friction coefficient μg for the presence of nanotextures. We have found a possible correlation between μg and the average local slope of the surface nanotextures.

Graphical abstract: Amontonian frictional behaviour of nanostructured surfaces

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Supplementary files

Article information


Submitted
24 Nov 2010
Accepted
11 Mar 2011
First published
08 Apr 2011

Phys. Chem. Chem. Phys., 2011,13, 9318-9326
Article type
Paper

Amontonian frictional behaviour of nanostructured surfaces

G. A. Pilkington, E. Thormann, P. M. Claesson, G. M. Fuge, O. J. L. Fox, M. N. R. Ashfold, H. Leese, D. Mattia and W. H. Briscoe, Phys. Chem. Chem. Phys., 2011, 13, 9318
DOI: 10.1039/C0CP02657C

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