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@ARTICLE{Hoffmann:819213,
      author       = {Hoffmann, Ingo and Simon, Miriam and Farago, Bela and
                      Schweins, Ralf and Falus, Peter and Holderer, Olaf and
                      Gradzielski, Michael},
      title        = {{S}tructure and dynamics of polyelectrolyte surfactant
                      mixtures under conditions of surfactant excess},
      journal      = {The journal of chemical physics},
      volume       = {145},
      number       = {12},
      issn         = {1089-7690},
      address      = {Melville, NY},
      publisher    = {American Institute of Physics},
      reportid     = {FZJ-2016-04921},
      pages        = {124901},
      year         = {2016},
      abstract     = {Oppositely charged polyelectrolyte (PE) surfactant mixtures
                      can self-assemble into a large variety of mesoscopic
                      structures, so-called polyelectrolyte surfactant complexes
                      (PESCs). These structures directly affect the macroscopic
                      behavior of such solutions. In this study, we investigated
                      mixtures of the cationically charged PE JR 400 and the
                      anionic surfactant SDS with the help of different neutron
                      scattering and fluorescence methods. While an excess of PE
                      charges in semi-dilute solutions causes an increase of
                      viscosity, it has been observed that an excess of surfactant
                      charges reduces the viscosity while precipitation is
                      observed at charge equilibrium. The increase in viscosity
                      had been investigated before and was attributed to the
                      formation of cross links between PE chains. In this
                      publication we focus our attention on the reduction of
                      viscosity which is observed with an excess of surfactant
                      charges. It is found that the PE chains form relatively
                      large and densely packed clusters near the phase boundary on
                      the surfactant rich side, thereby occupying less space and
                      reducing the viscosity. For even higher surfactant
                      concentrations, individual surfactant decorated PE chains
                      are observed and their viscosity is found to be similar to
                      that of the pure PE},
      cin          = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
                      (München) ; JCNS-FRM-II / Neutronenstreuung ; JCNS-1},
      ddc          = {540},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-1-20110106},
      pnm          = {6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
                      Neutron Research (JCNS) (POF3-623)},
      pid          = {G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
      experiment   = {EXP:(DE-MLZ)J-NSE-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000385562600062},
      doi          = {10.1063/1.4962581},
      url          = {https://juser.fz-juelich.de/record/819213},
}