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@ARTICLE{DeBeer:138058,
      author       = {De Beer, Sissi and Müser, Martin},
      title        = {{A}lternative dissipation mechanisms and the effect of the
                      solvent in friction between polymer brushes on rough
                      surfaces},
      journal      = {Soft matter},
      volume       = {9},
      number       = {30},
      issn         = {1744-6848},
      address      = {Cambridge},
      publisher    = {Royal Society of Chemistry (RSC)},
      reportid     = {FZJ-2013-04326},
      pages        = {7234 - 7241},
      year         = {2013},
      abstract     = {Surfaces covered with end-anchored polymers under good
                      solvent conditions have excellent tribological properties.
                      The friction between such surfaces is commonly attributed to
                      steady-state interdigitation of the opposing polymer
                      brushes. However, this conclusion tends to be based on
                      idealized geometries neglecting surface roughness. Using
                      molecular dynamics simulations, we find that there are
                      qualitative differences between the friction of rough and
                      flat polymer-brush surfaces. For rough surfaces the
                      dissipation due to transient interdigitation and capillary-
                      and shape-hysteresis is just as important or can even
                      dominate over steady-state interdigitation. Having a mix of
                      dissipation mechanisms that are all intertwined affects the
                      observed friction force in linear-response as well as in the
                      shear-thinning exponents and effective viscosity. Moreover,
                      we find that the effect of the solvent viscosity is
                      sublinear.},
      cin          = {JSC},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JSC-20090406},
      pnm          = {411 - Computational Science and Mathematical Methods
                      (POF2-411)},
      pid          = {G:(DE-HGF)POF2-411},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000321662600003},
      doi          = {10.1039/c3sm50491c},
      url          = {https://juser.fz-juelich.de/record/138058},
}