Abstract
We used the surface forces apparatus (SFA) to measure the viscosity and friction of confined films of octanol and undecanol as a function of film thickness. In contrast to structurally similar alkanes, the alcohols retain their bulk-like lubrication properties down to a thickness of only one (bi)layer. Only the self-assembled monolayers of alcohol molecules that form spontaneously on each mica surface display solid-like stick–slip motion upon shearing. During stick–slip motion, microscopic creep is found to precede macroscopic slip events at high loads. Apart from this creep process, we find a well-defined critical shear stress during stick–slip motion, which decreases weakly with increasing sliding speed.
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Dates
Type | When |
---|---|
Created | 23 years, 1 month ago (July 26, 2002, 10:13 a.m.) |
Deposited | 1 year, 6 months ago (Feb. 7, 2024, 9:43 a.m.) |
Indexed | 1 year, 6 months ago (Feb. 11, 2024, 6:22 a.m.) |
Issued | 24 years, 7 months ago (Jan. 22, 2001) |
Published | 24 years, 7 months ago (Jan. 22, 2001) |
Published Print | 24 years, 7 months ago (Jan. 22, 2001) |
@article{Mugele_2001, title={Frictional properties of thin chain alcohol films}, volume={114}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.1333756}, DOI={10.1063/1.1333756}, number={4}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Mugele, F. and Salmeron, M.}, year={2001}, month=jan, pages={1831–1836} }