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@INPROCEEDINGS{Naumann:188972,
      author       = {Naumann, Philipp and Wiegand, Simone and Sottmann, Thomas},
      title        = {{I}sothermal {B}ehavior of the {S}oret {E}ffect in
                      {N}onionic {M}icroemulsions: {S}ize {V}ariation by {U}sing
                      {D}ifferent n-{A}lkanes},
      reportid     = {FZJ-2015-02256},
      year         = {2014},
      abstract     = {In this work we investigate the thermodiffusion behavior of
                      microemulsion droplets of the type H2O / n-alkane / C12E5
                      using the n-alkanes: n-octane, n-decane, n-dodecane and
                      n-tetradecane [1]. In order to determine the thermodiffusion
                      behavior of these microemulsion droplets, we apply the
                      infrared thermal diffusion forced Rayleigh scattering
                      technique. We measure the Soret coefficient $S_T$ as
                      function of the structure upon approaching the
                      emulsification failure boundary (efb) and as a function of
                      the radius of the spherical o/w-microemulsion droplets close
                      to the efb. By varying the chain length of the n-alkanes we
                      are able to study the thermodiffusion behavior of droplets
                      of different sizes at the same temperature. In the
                      investigated range a linear dependence of the Soret
                      coefficient as function of the radius was found. Using a
                      proposed relationship between the Soret coefficient and the
                      temperature dependence of the interfacial tension, the
                      transition layer, l, could be determined for the first time
                      [2].Additionally, small angle neutron scattering (SANS)
                      experiments are performed to determine the size and to
                      examine in detail the shape of the microemulsion droplets,
                      as the droplets are known to elongate with increasing
                      temperature. Close to the efb the scattering curves could be
                      quantitatively described by a combination of a spherical
                      core-shell form factor and sticky hard sphere structure
                      factor. [1] Naumann, P., Datta, S., Sottmann, T., Arlt, B.,
                      Frielinghaus, H. and Wiegand, S. Submitted to J. Phys.
                      Chem.B.[2] Parola, A. and Piazza, R.; Particle
                      Thermophoresis in Liquids Eur. Phys. J. E., 15, pp. 255-263,
                      2004.},
      month         = {Jun},
      date          = {2014-06-01},
      organization  = {International Meeting on
                       Thermodiffusion 11, Bayonne (France), 1
                       Jun 2014 - 6 Jun 2014},
      subtyp        = {After Call},
      cin          = {ICS-3},
      cid          = {I:(DE-Juel1)ICS-3-20110106},
      pnm          = {451 - Soft Matter Composites (POF2-451)},
      pid          = {G:(DE-HGF)POF2-451},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/188972},
}