Nano Archive

Effects of Chain Length and Heat Treatment on the Nanotribology of Alkylsilane Monolayers Self-Assembled on a Rough Aluminum Surface

Khatri, Om P. and Bain, Colin D. and Biswas, Sanjay K. (2005) Effects of Chain Length and Heat Treatment on the Nanotribology of Alkylsilane Monolayers Self-Assembled on a Rough Aluminum Surface. Journal of Physical Chemistry B, 109 (49). pp. 23405-23414.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/jp054074e

Abstract

The conformational order of alkylsilane monolayers self-assembled on a rough aluminum surface is affected by the molecular chain length and the thermal history of the sample. These monolayers have been characterized by grazing angle FTIR spectroscopy. Tribological mechanisms were explored using initial molecular conformation order, sliding distance, normal load, and substrate compliance as experimental variables. Results indicate that the initial conformational disorder of the molecules determines the level of friction at the commencement of sliding. Adverse changes in dynamic friction and monolayer life during sliding are not thermally induced but are related to substrate roughness and local plasticity. Plastic deformation reduces the spatial density of the alkylsilane monolayer and is accentuated by an increase in the normal load.

Item Type:Article
Subjects:Material Science > Nanochemistry
ID Code:3868
Deposited By:JNCASR
Deposited On:27 Jan 2009 09:46
Last Modified:12 Feb 2009 14:00

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