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@ARTICLE{Cors:873380,
      author       = {Cors, Marian and Wiehemeier, Lars and Wrede, Oliver and
                      Feoktystov, Artem and Cousin, Fabrice and Hellweg, Thomas
                      and Oberdisse, Julian},
      title        = {{C}ontrast variation {SANS} measurement of shell monomer
                      density profiles of smart core–shell microgels},
      journal      = {Soft matter},
      volume       = {16},
      number       = {7},
      issn         = {1744-6848},
      address      = {London},
      publisher    = {Royal Soc. of Chemistry},
      reportid     = {FZJ-2020-00692},
      pages        = {1922-1930},
      year         = {2020},
      abstract     = {The radial density profile of deuterated poly(N,n-propyl
                      acrylamide) shell monomers within core–shell microgels has
                      been studied by small-angle neutron scattering in order to
                      shed light on the origin of their linear thermally-induced
                      swelling. The poly(N-isopropyl methacrylamide) core monomers
                      have been contrast-matched by the H2O/D2O solvent mixture,
                      and the intensity thus provides a direct measurement of the
                      spatial distribution of the shell monomers. Straightforward
                      modelling shows that their structure does not correspond to
                      the expected picture of a well-defined external shell. A
                      multi-shell model solved by a reverse Monte Carlo approach
                      is then applied to extract the monomer density as a function
                      of temperature and of the core crosslinking. It is found
                      that most shell monomers fill the core at high temperatures
                      approaching synthesis conditions of collapsed particles,
                      forming only a dilute corona. As the core monomers tend to
                      swell at lower temperatures, a skeleton of insoluble shell
                      monomers hinders swelling, inducing the progressive linear
                      thermoresponse.},
      cin          = {JCNS-FRM-II / JCNS-2 / MLZ},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-2-20110106 / 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:31995091},
      UT           = {WOS:000527137300020},
      doi          = {10.1039/C9SM02036E},
      url          = {https://juser.fz-juelich.de/record/873380},
}