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@ARTICLE{Kang:186475,
      author       = {Kang, Kyongok},
      title        = {{E}lectric-field induced microdynamics of charged rods},
      journal      = {Frontiers in Physics},
      volume       = {2},
      issn         = {2296-424X},
      address      = {Lausanne},
      publisher    = {Frontiers Media},
      reportid     = {FZJ-2015-00549},
      pages        = {73},
      year         = {2014},
      abstract     = {Electric-field induced phase/state transitions are observed
                      in AC electric fields with small amplitudes and low
                      frequencies in suspensions of charged fibrous viruses (fd),
                      which are model systems for highly charged rod-like
                      colloids. Texture- and particle-dynamics in these
                      field-induced states, and on crossing transition lines, are
                      explored by image time-correlation and dynamic light
                      scattering, respectively. At relatively low frequencies,
                      starting from a system within the isotropic-nematic
                      coexistence region, a transition from a nematic to a chiral
                      nematic is observed, as well as a dynamical state where
                      nematic domains melt and reform. These transitions are
                      preliminary due to field-induced dissociation/association of
                      condensed ions. At higher frequencies a uniform state is
                      formed that is stabilized by hydrodynamic interactions
                      through field-induced electro-osmotic flow where the rods
                      align along the field direction. There is a point in the
                      field-amplitude vs. frequency plane where various transition
                      lines meet. This point can be identified as a
                      “non-equilibrium critical point,” in the sense that a
                      length scale and a time scale diverge on approach of that
                      point. The microscopic dynamics exhibits discontinuities on
                      crossing transition lines that were identified independently
                      by means of image and signal correlation spectroscopy.},
      cin          = {ICS-3},
      ddc          = {530},
      cid          = {I:(DE-Juel1)ICS-3-20110106},
      pnm          = {451 - Soft Matter Composites (POF2-451)},
      pid          = {G:(DE-HGF)POF2-451},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.3389/fphy.2014.00073},
      url          = {https://juser.fz-juelich.de/record/186475},
}