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@ARTICLE{Xu:901870,
      author       = {Xu, Xufeng and Wu, Baohu and Cölfen, Helmut and de With,
                      Gijsbertus},
      title        = {{A}ssembly {C}ontrol at a {L}ow {P}éclet {N}umber in
                      {U}ltracentrifugation for {U}niformly {S}ized
                      {N}anoparticles},
      journal      = {The journal of physical chemistry / C},
      volume       = {125},
      number       = {16},
      issn         = {1932-7455},
      address      = {Washington, DC},
      publisher    = {Soc.},
      reportid     = {FZJ-2021-03878},
      pages        = {8752 - 8758},
      year         = {2021},
      abstract     = {The intrinsic high diffusion rate of colloids at low
                      Péclet number results in an extremely fast crystallization
                      process and instant formation of colloidal crystals, even at
                      an ultracentrifugal field of extremely high intensity. By
                      introducing a small number of clusters in sedimention, it
                      should be possible to slow down the crystallization process,
                      thus making the assembly order tunable in preparative
                      ultracentrifugation experiments. Here, we used sodium
                      dodecyl sulfate-stabilized polystyrene nanoparticles (with a
                      size dispersity of 1.07) dispersed in a solution of high
                      ionic strength. Sedimentation and assembly of these
                      nanoparticles were done using preparative
                      ultracentrifugation at various angular velocities. The
                      sedimentation process was also analyzed in situ by
                      analytical ultracentrifugation in real time. By creating as
                      low as $3\%$ of clusters into these nearly uniformly sized
                      polystyrene nanoparticle dispersions during the
                      sedimentation process, the superstructure order becomes
                      easily tunable between glassy and crystalline. Theoretical
                      calculations complemented the experiments to explain the
                      mechanism of cluster formation in sedimentation. This work
                      provides a novel methodology to produce superstructures with
                      a tunable packing order for colloids at low Péclet number.},
      cin          = {JCNS-4 / JCNS-1 / JCNS-FRM-II / MLZ},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JCNS-4-20201012 / I:(DE-Juel1)JCNS-1-20110106 /
                      I:(DE-Juel1)JCNS-FRM-II-20110218 / I:(DE-588b)4597118-3},
      pnm          = {6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ)
                      (POF4-6G4) / 632 - Materials – Quantum, Complex and
                      Functional Materials (POF4-632)},
      pid          = {G:(DE-HGF)POF4-6G4 / G:(DE-HGF)POF4-632},
      experiment   = {EXP:(DE-MLZ)KWS3-20140101},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {34093940},
      UT           = {WOS:000647271300030},
      doi          = {10.1021/acs.jpcc.1c00143},
      url          = {https://juser.fz-juelich.de/record/901870},
}