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@INPROCEEDINGS{Kang:902678,
      author       = {Kang, Kyongok},
      title        = {{C}haracterization of {F}ield-induced {D}ynamical {S}tates
                      and {E}quilibrium {P}hases of {C}harged {DNA}-viruses:
                      {I}n-situ {E}lectric field {S}mall {A}ngle {D}ynamic {L}ight
                      {S}cattering and {I}mage-time {C}orrelation.},
      school       = {KIT},
      reportid     = {FZJ-2021-04465},
      year         = {2021},
      abstract     = {The phase behavior of fd-viruses (a filamentous DNA-virus)
                      is strongly affected by ionic strength. In equilibrium, the
                      ionic strength determines the effective thickness and the
                      degree of electrostatic screening of the chirality of their
                      core, and therefore affects the concentration where phase
                      transitions occur and the type of phases that are observed.
                      At sufficiently low ionic strengths, nematic and
                      chiral-nematic (meso) phases, a glass state, and several
                      types of orientaional textures are found. Due to the very
                      high bare charge density of the viruses, there is a large
                      amount of condensed ions, that is, ions that are located in
                      the immediate vicinity of the core of the viruses. Under the
                      influence of a low AC external electric field, these
                      condensed ions dissociate/associate, and give rise to new
                      phases that are not found in equilibrium. In particular, a
                      dynamical state is observed, where nematic-domains
                      persistently melt and reform, and a critical point exists in
                      the divergence of time and the domain size, below a critical
                      ionic strength of about 1.2 mM. In this talk, I first
                      discuss the slow dynamics of chiral-mesophases and the glass
                      in equilibrium and the phase transitions in electric fields,
                      with an emphasis on the so-called image-time correlation
                      technique and dynamic light scattering to quantify the
                      kinetic behaviors of field-induced dynamical states.
                      Secondly, a short overview will be given on the response of
                      concentrated suspensions of charged DNA rods to shear flow.
                      Here, various types of inhomogeneous flow patterns are
                      observed, depending on both the concentration and shear
                      rate. If time allows, I will also present some preliminary
                      results on the interpenetration of negatively charged
                      fd-virus-viruses into the “membrane” of positively
                      charged Giant Unilamellar Vesicles (GUVs), and on protein
                      (lysozyme) aggregation, in the presence of an electric
                      field.},
      month         = {Oct},
      date          = {2021-10-26},
      organization  = {IBG-2, KIT seminar, Karlsruhe
                       (Germany), 26 Oct 2021 - 26 Oct 2021},
      subtyp        = {Invited},
      cin          = {IBI-4},
      cid          = {I:(DE-Juel1)IBI-4-20200312},
      pnm          = {5241 - Molecular Information Processing in Cellular Systems
                      (POF4-524)},
      pid          = {G:(DE-HGF)POF4-5241},
      typ          = {PUB:(DE-HGF)31},
      url          = {https://juser.fz-juelich.de/record/902678},
}