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@ARTICLE{AbaurreaVelasco:852737,
      author       = {Abaurrea Velasco, Clara and Abkenar, Masoud and Gompper,
                      Gerhard and Auth, Thorsten},
      title        = {{C}ollective behavior of self-propelled rods with quorum
                      sensing},
      journal      = {Physical review / E},
      volume       = {98},
      number       = {2},
      issn         = {2470-0045},
      address      = {Woodbury, NY},
      publisher    = {Inst.},
      reportid     = {FZJ-2018-05609},
      pages        = {022605},
      year         = {2018},
      abstract     = {Active agents—like phoretic particles, bacteria, sperm,
                      and cytoskeletal filaments in motility assays—show a large
                      variety of motility-induced collective behaviors, such as
                      aggregation, clustering, and phase separation. The behavior
                      of dense suspensions of engineered phoretic particles and of
                      bacteria during biofilm formation is determined by two
                      qualitatively different physical mechanisms: (i) volume
                      exclusion (short-range steric repulsion) and (ii) quorum
                      sensing (longer-range reduced propulsion due to alteration
                      of the local chemical environment). To systematically
                      characterize such systems, we study semi-penetrable
                      self-propelled rods in two dimensions, with a propulsion
                      force that decreases with increasing local rod density, by
                      employing Brownian dynamics simulations. Volume exclusion
                      and quorum sensing both lead to phase separation; however,
                      the structure of the systems and the rod dynamics vastly
                      differ. Quorum sensing enhances the polarity of the
                      clusters, induces perpendicularity of rods at the cluster
                      borders, and enhances cluster formation. For systems where
                      the rods essentially become passive at high densities,
                      formation of asters and stripes is observed. Systems of rods
                      with larger aspect ratios show more ordered structures
                      compared to those with smaller aspect ratios, due to their
                      stronger alignment, with almost circular asters for strongly
                      density-dependent propulsion force. With increasing range of
                      the quorum-sensing interaction, the local density decreases,
                      asters become less stable, and polar hedgehog clusters and
                      clusters with domains appear.},
      cin          = {ICS-2 / JARA-HPC},
      ddc          = {530},
      cid          = {I:(DE-Juel1)ICS-2-20110106 / $I:(DE-82)080012_20140620$},
      pnm          = {551 - Functional Macromolecules and Complexes (POF3-551) /
                      Hydrodynamics of Active Biological Systems
                      $(jiff26_20110501)$},
      pid          = {G:(DE-HGF)POF3-551 / $G:(DE-Juel1)jiff26_20110501$},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:30253508},
      UT           = {WOS:000441466800008},
      doi          = {10.1103/PhysRevE.98.022605},
      url          = {https://juser.fz-juelich.de/record/852737},
}