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Title: Atomic scale friction in the function of modified Eyring activation energies
Authors: Chong, W.W.F.
Rahnejat, Homer
Keywords: Friction force microscopy
Modified Eyring thermal activation 'cage' model
Molecular solvation
Nanoscale friction
Potential energy barrier
Issue Date: 2015
Publisher: © Trans Tech Publications
Citation: CHONG, W.W.F. and RAHNEJAT, H., 2015. Atomic scale friction in the function of modified Eyring activation energies. Key Engineering Materials, 642, pp. 3 - 7.
Abstract: At microscale, friction is better understood fundamentally through hydrodynamic and elastohydrodynamic lubrication. However, the mechanisms governing friction at nanoscale remains a subject of interest. With the emergence of small-scale devices such as Microelectromechanical Systems (MEMS) and Nanoelectromechanical Systems (NEMS), there is a need to improve on the fundamental understanding of friction at diminishing gaps. Therefore, the paper investigates the friction of a simple fluid (n-hexadecane 99%) using an atomic force microscope. The measurements are interpreted using modified Eyring’s thermal activation energy approach in order to examine the effect of molecular solvation at the assumed smooth summit of asperities. It is found out that solvation for a sliding contact could be observed through the shear stress activation volume due to generated thermal energy, which indicates the movement of the fluid molecules into and out of the contact.
Description: This article was published in the journal, Key Engineering Materials [© Trans Tech Publications]. The definitive version is available at: http://dx.doi.org/10.4028/www.scientific.net/KEM.642.3
Sponsor: The authors acknowledge the support provided by the Malaysian Ministry of Education under the Fundamental Research Grant Scheme (FRGS) through the n-SIMPAC project and the Exploratory Research Grant Scheme (ERGS) through The Design of Lubricant and Surface Interaction for Reduced Boundary Friction and Wear project.
Version: Accepted for publication
DOI: 10.4028/www.scientific.net/KEM.642.3
URI: https://dspace.lboro.ac.uk/2134/17977
Publisher Link: http://dx.doi.org/10.4028/www.scientific.net/KEM.642.3
ISSN: 1013-9826
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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