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@ARTICLE{Kokot:840601,
      author       = {Kokot, Gašper and Das, Shibananda and Winkler, Roland G.
                      and Gompper, Gerhard and Aranson, Igor S. and Snezhko,
                      Alexey},
      title        = {{A}ctive turbulence in a gas of self-assembled spinners},
      journal      = {Proceedings of the National Academy of Sciences of the
                      United States of America},
      volume       = {114},
      number       = {49},
      issn         = {1091-6490},
      address      = {Washington, DC},
      publisher    = {National Acad. of Sciences},
      reportid     = {FZJ-2017-08106},
      pages        = {12870 - 12875},
      year         = {2017},
      abstract     = {Colloidal particles subject to an external periodic forcing
                      exhibit complex collective behavior and self-assembled
                      patterns. A dispersion of magnetic microparticles confined
                      at the air–liquid interface and energized by a uniform
                      uniaxial alternating magnetic field exhibits dynamic arrays
                      of self-assembled spinners rotating in either direction.
                      Here, we report on experimental and simulation studies of
                      active turbulence and transport in a gas of self-assembled
                      spinners. We show that the spinners, emerging as a result of
                      spontaneous symmetry breaking of clock/counterclockwise
                      rotation of self-assembled particle chains, generate
                      vigorous vortical flows at the interface. An ensemble of
                      spinners exhibits chaotic dynamics due to self-generated
                      advection flows. The same-chirality spinners (clockwise or
                      counterclockwise) show a tendency to aggregate and form
                      dynamic clusters. Emergent self-induced interface currents
                      promote active diffusion that could be tuned by the
                      parameters of the external excitation field. Furthermore,
                      the erratic motion of spinners at the interface generates
                      chaotic fluid flow reminiscent of 2D turbulence. Our work
                      provides insight into fundamental aspects of collective
                      transport in active spinner materials and yields rules for
                      particle manipulation at the microscale.},
      cin          = {IAS-2},
      ddc          = {000},
      cid          = {I:(DE-Juel1)IAS-2-20090406},
      pnm          = {553 - Physical Basis of Diseases (POF3-553)},
      pid          = {G:(DE-HGF)POF3-553},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000417339700023},
      pubmed       = {pmid:29158382},
      doi          = {10.1073/pnas.1710188114},
      url          = {https://juser.fz-juelich.de/record/840601},
}