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@ARTICLE{deGans:32997,
      author       = {de Gans, B.-J. and Wiegand, S. and Luettmer-Strathmann, J.},
      title        = {{U}nusual {T}hermal {D}iffusion in {P}olymer {S}olutions},
      journal      = {Physical review letters},
      volume       = {91},
      issn         = {0031-9007},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {PreJuSER-32997},
      pages        = {245501-4},
      year         = {2003},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {Thermal diffusion forced Rayleigh scattering results on
                      thermal diffusion of poly(ethylene oxide) (PEO) in
                      ethanol/water mixtures are presented. In water-rich solvent
                      mixtures, PEO is found to migrate towards regions of lower
                      temperature. This is typical for polymer solutions and
                      corresponds to a positive Soret coefficient of PEO. In
                      solvent mixtures with low water content, however, the
                      polymer is found to migrate towards higher temperatures,
                      corresponding to a negative Soret coefficient of PEO in
                      ethanol-rich solutions. To our knowledge, this is the first
                      observed sign change of the Soret coefficient of a polymer
                      in solution. We also present a simple lattice model for the
                      polymer solvent system and calculate Soret coefficients with
                      statistical mechanics methods. The calculated values agree
                      qualitatively with the experimental results.},
      keywords     = {J (WoSType)},
      cin          = {IFF-WM},
      ddc          = {550},
      cid          = {I:(DE-Juel1)VDB36},
      pnm          = {Kondensierte Materie},
      pid          = {G:(DE-Juel1)FUEK242},
      shelfmark    = {Physics, Multidisciplinary},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000187202000041},
      doi          = {10.1103/PhysRevLett.91.245501},
      url          = {https://juser.fz-juelich.de/record/32997},
}