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@INPROCEEDINGS{Gvaramia:872674,
      author       = {Gvaramia, Manuchar and Mangiapia, Gaetano and Falus, Peter
                      and Ohl, Michael and Holderer, Olaf and Frielinghaus,
                      Henrich},
      title        = {{C}apillary condensation in microemulsions},
      reportid     = {FZJ-2020-00165},
      year         = {2019},
      abstract     = {Microemulsions are thermodynamically stable mixtures of oil
                      and water that are mediated by the surfactant. Locally,
                      there are oil and water domains that are observable by
                      scattering experiments that are separated by the surfactant
                      film. The domain sizes are usually a few nanometers and
                      display shapes from spherical droplets over elongated
                      droplets to the bicontinuous sponge phase. In the following
                      we restrict ourselves to the bicontinuous microemulsion.
                      When exposing the microemulsion to hydrophilic surfaces, a
                      lamellar order is locally induced next to the interface.
                      From spectroscopic measurements, we know that the membrane
                      fluctuations in microemulsions are faster in the lamellar
                      state. This is connected to the lubrication effect, because
                      the lamellae can slide off easier and the motions are
                      faster. In spectroscopic measurements with hydrophilic clay
                      particles, we could show, that the platelet diameter causes
                      a cutoff of the undulation modes, and larger platelets cause
                      a better order with longer wavelength modes. The capillary
                      condensation in bicontinuous microemulsions is expected to
                      take place when two parallel surfaces are narrowed that
                      result in a completely lamellar microemulsion (Figure). So
                      far, all experiments stayed at relatively low clay
                      concentrations, when the system is still liquid. The
                      lamellar fraction in microemulsions with $1\%$ clay is
                      around $25\%$ in volume. We now tried to observe the
                      capillary condensation with increasing clay concentration
                      using small angle neutron scattering (SANS) and neutron spin
                      echo (NSE) spectroscopy.},
      month         = {Feb},
      date          = {2019-02-13},
      organization  = {MML Workshop at HZDR/Dresden, Dresden
                       (Germany), 13 Feb 2019 - 15 Feb 2019},
      subtyp        = {Outreach},
      cin          = {JCNS-FRM-II / JCNS-1 / MLZ},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-1-20110106 / I:(DE-588b)4597118-3},
      pnm          = {6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)
                      / 6G15 - FRM II / MLZ (POF3-6G15) / 6215 - Soft Matter,
                      Health and Life Sciences (POF3-621)},
      pid          = {G:(DE-HGF)POF3-6G4 / G:(DE-HGF)POF3-6G15 /
                      G:(DE-HGF)POF3-6215},
      experiment   = {EXP:(DE-MLZ)KWS1-20140101},
      typ          = {PUB:(DE-HGF)24},
      url          = {https://juser.fz-juelich.de/record/872674},
}