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@ARTICLE{Nickel:866776,
      author       = {Nickel, Anne C. and Scotti, Andrea and Houston, Judith and
                      Ito, Thiago and Crassous, Jérôme and Pedersen, Jan Skov
                      and Richtering, Walter},
      title        = {{A}nisotropic {H}ollow {M}icrogels {T}hat {C}an {A}dapt
                      {T}heir {S}ize, {S}hape, and {S}oftness},
      journal      = {Nano letters},
      volume       = {19},
      number       = {11},
      issn         = {1530-6992},
      address      = {Washington, DC},
      publisher    = {ACS Publ.},
      reportid     = {FZJ-2019-05842},
      pages        = {8161 - 8170},
      year         = {2019},
      abstract     = {The development of soft anisotropic building blocks is of
                      great interest for various applications in soft matter.
                      Furthermore, such systems would be important model systems
                      for ordering phenomena in fundamental soft matter science.
                      In this work, we address the challenge of creating hollow
                      and anisotropically shaped thermoresponsive microgels,
                      polymeric networks with a solvent filled cavity in their
                      center that are swollen in a good solvent. Sacrificial
                      elliptical hematite silica particles were utilized as a
                      template for the synthesis of a cross-linked
                      N-isopropylacrylamide (NIPAm) shell. By varying the amount
                      of NIPAm, two anisotropic microgels were synthesized with
                      either a thin or thick microgel shell. We characterized
                      these precursor core–shell and the resulting hollow
                      microgels using a combination of light, X-ray, and neutron
                      scattering. New form factor models, accounting for the
                      cavity, the polymer distribution and the anisotropy, have
                      been developed for fitting the scattering data. With such
                      models, we demonstrated the existence of the cavity and
                      simultaneously the anisotropic character of the microgels.
                      Furthermore, we show that the thickness of the shell has a
                      major influence on the shape and the cavity dimension of the
                      microgel after etching of the sacrificial core. Finally, the
                      effect of temperature is investigated, showing that changes
                      in size, softness, and aspect ratio are triggered by
                      temperature.},
      cin          = {JCNS-FRM-II / JCNS-1 / MLZ},
      ddc          = {660},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-1-20110106 / I:(DE-588b)4597118-3},
      pnm          = {6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)
                      / 6G15 - FRM II / MLZ (POF3-6G15)},
      pid          = {G:(DE-HGF)POF3-6G4 / G:(DE-HGF)POF3-6G15},
      experiment   = {EXP:(DE-MLZ)KWS2-20140101},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:31613114},
      UT           = {WOS:000497259300072},
      doi          = {10.1021/acs.nanolett.9b03507},
      url          = {https://juser.fz-juelich.de/record/866776},
}