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@ARTICLE{RomeroSanchez:906186,
      author       = {Romero-Sanchez, Ivany and Pihlajamaa, Ilian and Adzic,
                      Natasa and Castellano, Laura E. and Stiakakis, Emmanuel and
                      Likos, Christos N. and Laurati, Marco},
      title        = {{B}lunt-{E}nd {D}riven {R}e-entrant {O}rdering in {Q}uasi
                      {T}wo-{D}imensional {D}ispersions of {S}pherical {DNA}
                      {B}rushes},
      journal      = {ACS nano},
      volume       = {16},
      issn         = {1936-0851},
      address      = {Washington, DC},
      publisher    = {Soc.},
      reportid     = {FZJ-2022-01285},
      pages        = {2133-2146},
      year         = {2022},
      abstract     = {We investigate the effects of crowding on the conformations
                      and assembly of confined, highly charged, and thick
                      polyelectrolyte brushes in the osmotic regime. Particle
                      tracking experiments on increasingly dense suspensions of
                      colloids coated with ultralong double-stranded DNA (dsDNA)
                      fragments reveal nonmonotonic particle shrinking,
                      aggregation, and re-entrant ordering. Theory and simulations
                      show that aggregation and re-entrant ordering arise from the
                      combined effect of shrinking, which is induced by the
                      osmotic pressure exerted by the counterions absorbed in
                      neighbor brushes and of a short-range attractive interaction
                      competing with electrostatic repulsion. An unconventional
                      mechanism gives origin to the short-range attraction:
                      blunt-end interactions between stretched dsDNA fragments of
                      neighboring brushes, which become sufficiently intense for
                      dense and packed brushes. The attraction can be tuned by
                      inducing free-end backfolding through the addition of
                      monovalent salt. Our results show that base stacking is a
                      mode parallel to hybridization to steer colloidal assembly
                      in which attractions can be fine-tuned through salinity and,
                      potentially, grafting density and temperature.},
      cin          = {IBI-4},
      ddc          = {540},
      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)16},
      UT           = {WOS:000776691400037},
      doi          = {10.1021/acsnano.1c07799},
      url          = {https://juser.fz-juelich.de/record/906186},
}