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005     20200423203957.0
017 _ _ |a This version is available at the following Publisher URL: http://jcp.aip.org
024 7 _ |a pmid:15538886
|2 pmid
024 7 _ |a 10.1063/1.1806814
|2 DOI
024 7 _ |a WOS:000224895000047
|2 WOS
024 7 _ |a 2128/1393
|2 Handle
037 _ _ |a PreJuSER-42960
041 _ _ |a eng
082 _ _ |a 540
084 _ _ |2 WoS
|a Physics, Atomic, Molecular & Chemical
100 1 _ |a Samoilov, V. N.
|b 0
|0 P:(DE-HGF)0
245 _ _ |a The effect of surface roughness on the adhesion of solid surfaces for systems with and without liquid lubricant
260 _ _ |a Melville, NY
|b American Institute of Physics
|c 2004
300 _ _ |a 9639 - 9647
336 7 _ |a Journal Article
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336 7 _ |a JOURNAL_ARTICLE
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336 7 _ |a article
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440 _ 0 |a Journal of Chemical Physics
|x 0021-9606
|0 3145
|y 19
|v 121
500 _ _ |a Record converted from VDB: 12.11.2012
520 _ _ |a We present molecular dynamics results for the interaction between two solid elastic walls during pull-off for systems with and without octane (C(8)H(18)) lubricant. We used two types of substrate--flat and corrugated--and varied the lubricant coverage from approximately 1/8 to approximately 4 ML (monolayers) of octane. For the flat substrate without lubricant the maximum adhesion was found to be approximately three times larger than for the system with the corrugated substrate. As a function of the octane coverage (for the corrugated substrate) the pull-off force first increases as the coverage increases from 0 to approximately 1 ML, and then decreases as the coverage is increased beyond monolayer coverage. It is shown that at low octane coverage, the octane molecules located in the substrate corrugation wells during squeezing are pulled out of the wells during pull-off, forming a network of nanocapillary bridges around the substrate nanoasperities, thus increasing the adhesion between two surfaces. For greater lubricant coverages a single capillary bridge is formed. The adhesion force saturates for lubricant coverages greater than 3 ML. For the flat substrate, during pull-off we observe discontinuous, thermally activated changes in the number n of lubricant layers (n-1-->n layering transitions), whereas for the corrugated substrate these transitions are "averaged" by the substrate surface roughness.
536 _ _ |a Kondensierte Materie
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588 _ _ |a Dataset connected to Web of Science, Pubmed
650 _ 7 |a J
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700 1 _ |a Sivebaek, I. M.
|b 1
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700 1 _ |a Persson, B. N. J.
|b 2
|u FZJ
|0 P:(DE-Juel1)130885
773 _ _ |a 10.1063/1.1806814
|g Vol. 121, p. 9639 - 9647
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856 7 _ |u http://dx.doi.org/10.1063/1.1806814
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