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Frictional behavior of micro-patterned silicon surface
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik. Department of Chemistry Surface and Corrosion Science, KTH Royal Institute of Technology.
2015 (English)In: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. 456, 76-84 p.Article in journal (Refereed) Published
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Abstract [en]

A micro-patterned silicon surface, consisting of depressions with walls having a tilt angle of 30°, was created by photolithography followed by etching. The friction forces in single asperity contact acting between such a surface and an AFM tip was measured in air. This allowed elucidation of the validity of some common friction rules for this particular situation where a small tip traces a surface having roughness features that are significantly larger than the tip itself. The rules that was compared with our data were Amontons' first rule of friction stating that the friction force should be proportional to the load; Amontons' third rule stating that the friction force should be independent of sliding speed, and Euler's rule providing a relation between slope angle and friction coefficient. We found that both nanoscale surface heterogeneities and the μm-sized depressions affect friction forces, and considerable reproducible variations were found along a particular scan line. Nevertheless Amontons' first rule described average friction forces well. Amontons' third rule and Euler's rule were found to be less applicable to our system.

Place, publisher, year, edition, pages
Academic Press, 2015. Vol. 456, 76-84 p.
Keyword [en]
adhesion, Amontons' rule, capillary condensation, Coulomb's rule, Euler's rule, friction force, micro-patterned surface
National Category
Atom and Molecular Physics and Optics Other Chemistry Topics
Identifiers
URN: urn:nbn:se:ri:diva-166DOI: 10.1016/j.jcis.2015.06.009Scopus ID: 2-s2.0-84934895458OAI: oai:DiVA.org:ri-166DiVA: diva2:939319
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Publication no: A3563

Available from: 2016-06-18 Created: 2016-06-07 Last updated: 2017-11-28Bibliographically approved

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