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@ARTICLE{Cors:874809,
      author       = {Cors, Marian and Wrede, Oliver and Wiehemeier, Lars and
                      Feoktystov, Artem and Cousin, Fabrice and Hellweg, Thomas
                      and Oberdisse, Julian},
      title        = {{S}patial distribution of core monomers in acrylamide-based
                      core-shell microgels with linear swelling behaviour},
      journal      = {Scientific reports},
      volume       = {9},
      number       = {1},
      issn         = {2045-2322},
      address      = {[London]},
      publisher    = {Macmillan Publishers Limited, part of Springer Nature},
      reportid     = {FZJ-2020-01657},
      pages        = {13812},
      year         = {2019},
      abstract     = {The peculiar linear temperature-dependent swelling of
                      core-shell microgels has been conjectured to be linked to
                      the core-shell architecture combining materials of different
                      transition temperatures. Here the structure of pNIPMAM-core
                      and pNNPAM-shell microgels in water is studied as a function
                      of temperature using small-angle neutron scattering with
                      selective deuteration. Photon correlation spectroscopy is
                      used to scrutinize the swelling behaviour of the colloidal
                      particles and reveals linear swelling. Moreover, these
                      experiments are also employed to check the influence of
                      deuteration on swelling. Using a form-free multi-shell
                      reverse Monte Carlo approach, the small-angle scattering
                      data are converted into radial monomer density profiles. The
                      comparison of ‘core-only’ particles consisting of
                      identical cores to fully hydrogenated core-shell microgels,
                      and finally to H-core/D-shell architectures unambiguously
                      shows that core and shell monomers display gradient profiles
                      with strong interpenetration, leading to cores embedded in
                      shells which are bigger than their isolated ‘core-only’
                      precursor particles. This surprising result is further
                      generalized to different core cross-linker contents, for
                      temperature ranges encompassing both transitions. Our
                      analysis demonstrates that the internal structure of
                      pNIPMAM-core and pNNPAM-shell microgels is heterogeneous and
                      strongly interpenetrated, presumably allowing only
                      progressive core swelling at temperatures intermediate to
                      both transition temperatures, thus promoting linear swelling
                      behaviour.},
      cin          = {JCNS-FRM-II / JCNS-2 / JCNS-1 / MLZ},
      ddc          = {600},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-2-20110106 / 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)KWS1-20140101},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:31554839},
      UT           = {WOS:000487586600003},
      doi          = {10.1038/s41598-019-50164-6},
      url          = {https://juser.fz-juelich.de/record/874809},
}