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Amontonian frictional behaviour of nanostructured surfaces
School of Chemistry, University of Bristol.
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Surface and Corrosion Science.
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Surface and Corrosion Science.
School of Chemistry, University of Bristol.
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2011 (English)In: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, E-ISSN 1463-9084, Vol. 13, 9318-9326 p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2011. Vol. 13, 9318-9326 p.
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URN: urn:nbn:se:kth:diva-70260DOI: 10.1039/c0cp02657cISI: 000290224900032Scopus ID: 2-s2.0-79955642355OAI: oai:DiVA.org:kth-70260DiVA: diva2:486144
Note
QC 20120207Available from: 2012-02-07 Created: 2012-01-30 Last updated: 2017-12-08Bibliographically approved

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