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@ARTICLE{Samoilov:42960,
      author       = {Samoilov, V. N. and Sivebaek, I. M. and Persson, B. N. J.},
      title        = {{T}he effect of surface roughness on the adhesion of solid
                      surfaces for systems with and without liquid lubricant},
      journal      = {The journal of chemical physics},
      volume       = {121},
      issn         = {0021-9606},
      address      = {Melville, NY},
      publisher    = {American Institute of Physics},
      reportid     = {PreJuSER-42960},
      pages        = {9639 - 9647},
      year         = {2004},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {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.},
      keywords     = {J (WoSType)},
      cin          = {IFF-TH-I},
      ddc          = {540},
      cid          = {I:(DE-Juel1)VDB30},
      pnm          = {Kondensierte Materie},
      pid          = {G:(DE-Juel1)FUEK242},
      shelfmark    = {Physics, Atomic, Molecular $\&$ Chemical},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:15538886},
      UT           = {WOS:000224895000047},
      doi          = {10.1063/1.1806814},
      url          = {https://juser.fz-juelich.de/record/42960},
}