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@ARTICLE{Klostermann:19618,
      author       = {Klostermann, M. and Strey, R. and Sottmann, T. and
                      Schweins, R. and Lindner, P. and Holderer, O. and
                      Monkenbusch, M. and Richter, D.},
      title        = {{S}tructure and dynamics of balanced supercritical
                      {CO}2-microemulsions},
      journal      = {Soft matter},
      volume       = {8},
      issn         = {1744-683X},
      address      = {Cambridge},
      publisher    = {Royal Society of Chemistry (RSC)},
      reportid     = {PreJuSER-19618},
      pages        = {797 - 807},
      year         = {2012},
      note         = {We wish to thank L. Kramer for his help in the early stages
                      of these studies, O. Klems and V. Dahl for their assistance
                      with the SANS experiments and Klaus Wormuth for his careful
                      revision of the manuscript. Furthermore we would like to
                      thank H. Metzner and the technical workshop as well as W.
                      Rohl for their essential contributions in the development of
                      the high-pressure cells. We also thank the Fund of the
                      Chemical Industry in Germany (VCI), the International
                      Helmholtz Research School of Biophysics and Soft Matter
                      (IHRS BioSoft) as well as the EU-network of excellence
                      SoftComp for financial support. In addition we wish to thank
                      DuPont for the free Zonyl samples. Finally we thank the ILL
                      and the JCNS for the opportunity to perform neutron
                      scattering experiments and for financial support.},
      abstract     = {Balanced scCO(2)-microemulsions contain equal volumes of
                      water and CO2 and are a novel class of microemulsions of
                      substantial interest for both fundamental research and
                      technical applications. One existing feature of these
                      systems is that the solvent quality of scCO(2), and hence
                      the overall microemulsion properties, is tuned simply by
                      adjusting pressure, which is not possible with "classical"
                      microemulsions containing oil instead of CO2. Motivated by
                      this, we systematically investigated the phase behavior, the
                      microstructure, and the dynamics of balanced microemulsion
                      systems of the type H2O-CO2-Zonyl FSO 100/Zonyl FSN 100. In
                      systematic phase behavior studies, we found that upon
                      increasing pressure, CO2 and water are more efficiently
                      solubilized. Small angle neutron scattering (SANS)
                      experiments were conducted in order to determine the
                      topology and the length scales of the underlying
                      microstructure. The results obtained strongly suggest the
                      existence of bicontinuously structured microemulsions with
                      an adjustable characteristic length scale of up to 330
                      angstrom. From a quantitative analysis of the SANS data, we
                      found that at a fixed microemulsion composition the
                      stiffness of the surfactant membrane is increased solely by
                      increasing the pressure, whereby the renormalization
                      corrected (i.e. bare) bending rigidity kappa(0), SANS rises
                      from kappa(0,SANS) 0.88 k(B)T at 200 bar to 0.93 k(B)T at
                      300 bar. These findings were confirmed with high pressure
                      neutron spin echo experiments.},
      keywords     = {J (WoSType)},
      cin          = {ICS-1 / JCNS (München) ; Jülich Centre for Neutron
                      Science JCNS (München) ; JCNS-FRM-II / JCNS-1},
      ddc          = {530},
      cid          = {I:(DE-Juel1)ICS-1-20110106 /
                      I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-1-20110106},
      pnm          = {BioSoft: Makromolekulare Systeme und biologische
                      Informationsverarbeitung / Großgeräte für die Forschung
                      mit Photonen, Neutronen und Ionen (PNI)},
      pid          = {G:(DE-Juel1)FUEK505 / G:(DE-Juel1)FUEK415},
      experiment   = {EXP:(DE-MLZ)J-NSE-20140101},
      shelfmark    = {Chemistry, Physical / Materials Science, Multidisciplinary
                      / Physics, Multidisciplinary / Polymer Science},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000301793700028},
      doi          = {10.1039/c1sm06533e},
      url          = {https://juser.fz-juelich.de/record/19618},
}