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@ARTICLE{Kang:891850,
      author       = {Kang, Kyongok and Lee, Dongwook and Seo, Jiwon},
      title        = {{F}requency-responsive cooperativity of graphene oxide
                      complexes under a low {AC} bulk electric field},
      journal      = {Journal of molecular liquids},
      volume       = {335},
      issn         = {0167-7322},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2021-01770},
      pages        = {116151 -},
      year         = {2021},
      abstract     = {Graphene oxide (GO) is a promising material for the
                      construction of biological functional surfaces and
                      corresponding biomedical applications. The physical
                      properties of sheets of GO are determined by its
                      conductivity, flexibility (being just a few atomic carbon
                      layers thick), and hydrophilicity/hydrophobicity. In order
                      to exploiting multitask surfaces, however, controlling
                      reliable tunability of the complex formation with other
                      macromolecules in aqueous environments is highly non-trivial
                      due to the hydrophobic nature of GO. Thus, one effective way
                      of complicated physical process of dealing with aqueous
                      systems of GO is to perform the complex formation under
                      in-situ external fields. In this paper, we report the
                      response of GO-sheets, complexed with spherical colloidal
                      polystyrene particles, nafion, and long and thin DNA-viruses
                      (fd), in alternating electric fields, probed by means of
                      novel experimental methods of image-time correlation
                      spectroscopy and small-angle dynamic light scattering. Here,
                      the frequency-responsive reorientations of a GO-sheet are
                      interpreted by random orientations of particles. As results,
                      we have found that GO carries overall local reorientations
                      with feedback oscillations, as well in the GO-complexes (of
                      a colloidal sphere polymerized polystyrene (PPs) and nafion
                      solution). However, such oscillations are absent, as
                      overdamped Brownian motion, in the mixture of DNA-virus
                      suspension (with GO-PPs). This indicates that Brownian
                      fluctuations of GO can be effectively stabilized, and
                      cooperated in the membrane-based, isotropic rod-mesh network
                      of DNA-virus (fd) suspension. We hope then the results are
                      useful to foster better designs of processing GO-sheets in
                      the controls of accessible biological and biomedical
                      applications.},
      cin          = {IBI-4},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IBI-4-20200312},
      pnm          = {524 - Molecular and Cellular Information Processing
                      (POF4-524)},
      pid          = {G:(DE-HGF)POF4-524},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000662831600040},
      doi          = {10.1016/j.molliq.2021.116151},
      url          = {https://juser.fz-juelich.de/record/891850},
}