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@ARTICLE{Tartaglino:53859,
      author       = {Tartaglino, U. and Sivebaek, I. M. and Persson, B. N. J.
                      and Tosatti, E.},
      title        = {{I}mpact of molecular structure on the lubricant
                      squeeze-out between curved surfaces with long range
                      elasticity},
      journal      = {The journal of chemical physics},
      volume       = {125},
      issn         = {0021-9606},
      address      = {Melville, NY},
      publisher    = {American Institute of Physics},
      reportid     = {PreJuSER-53859},
      pages        = {014704},
      year         = {2006},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {The properties of butane (C4H10) lubricants confined
                      between two approaching solids are investigated by a model
                      that accounts for the curvature and elastic properties of
                      the solid surfaces. We consider the linear n-butane and the
                      branched isobutane. For the linear molecule, well defined
                      molecular layers develop in the lubricant film when the
                      width is of the order of a few atomic diameters. The
                      branched isobutane forms more disordered structures which
                      permit it to stay liquidlike at smaller surface separations.
                      During squeezing the solvation forces show oscillations
                      corresponding to the width of a molecule. At low speeds
                      (<0.1 ms) the last layers of isobutane are squeezed out
                      before those of n-butane. Since the (interfacial) squeezing
                      velocity in most practical applications is very low when the
                      lubricant layer has molecular thickness, one expects
                      n-butane to be a better boundary lubricant than isobutane.
                      With n-butane possessing a slightly lower viscosity at high
                      pressures, our result refutes the view that squeeze-out
                      should be harder for higher viscosities; on the other hand
                      our results are consistent with wear experiments in which
                      n-butane were shown to protect steel surfaces better than
                      isobutane.},
      keywords     = {J (WoSType)},
      cin          = {IFF-TH-I},
      ddc          = {540},
      cid          = {I:(DE-Juel1)VDB30},
      pnm          = {Kondensierte Materie},
      pid          = {G:(DE-Juel1)FUEK414},
      shelfmark    = {Physics, Atomic, Molecular $\&$ Chemical},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:16863321},
      UT           = {WOS:000238849500042},
      doi          = {10.1063/1.2210008},
      url          = {https://juser.fz-juelich.de/record/53859},
}