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@INPROCEEDINGS{Kyrey:874707,
      author       = {Kyrey, Tetyana and Witte, Judith and Stingaciu, Laura and
                      Witt, Marcus and von Klitzing, Regine and Wellert, Stefan
                      and Holderer, Olaf},
      title        = {{S}tructure and dynamics of homogeneously and
                      heterogeneously crosslinked {PNIPAM} microgels},
      reportid     = {FZJ-2020-01622},
      year         = {2020},
      abstract     = {Thermoresponsive poly(N-isopropylacrylamide) microgel
                      particles have been largely studied in the past due to their
                      interesting fundamental properties as well as their
                      potential for application in drug delivery, sensor
                      technology or biotechnology. In this contribution, microgel
                      particles with homogeneous and heterogeneous crosslink
                      distribution and different crosslinker concentrations will
                      be studied with small angle neutron scattering (SANS) and
                      neutron spin echo spectroscopy (NSE).The segmental dynamics
                      of polymer chains in solution, as described by the Zimm
                      model, is modified in microgels due to the presence of
                      crosslinks and the crowded environment inside the particle,
                      both inducing heterogeneities, for example “frozen”
                      inhomogeneities or density fluctuations. Such structural
                      heterogeneities have an impact on the segmental chain
                      dynamics, which makes NSE, the highest resolution neutron
                      spectroscopy technique, the experiment of choice for
                      accessing variations and changes induced by changes in
                      crosslink distribution and crosslink density.An outlook on
                      interface effects on the internal structure and
                      inhomogeneities of microgel particles will be given.*Support
                      of the DFG (grant number WE5066/3-1 (S. Wellert) and HO
                      5488/2-1 (O. Holderer) is acknowledged.},
      month         = {Mar},
      date          = {2020-03-02},
      organization  = {APS March Meeting 2020, Denver (USA),
                       2 Mar 2020 - 6 Mar 2020},
      subtyp        = {After Call},
      cin          = {JCNS-FRM-II / JCNS-1 / MLZ},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-1-20110106 / I:(DE-588b)4597118-3},
      pnm          = {6215 - Soft Matter, Health and Life Sciences (POF3-621) /
                      6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
                      Neutron Research (JCNS) (POF3-623)},
      pid          = {G:(DE-HGF)POF3-6215 / G:(DE-HGF)POF3-6G15 /
                      G:(DE-HGF)POF3-6G4},
      experiment   = {EXP:(DE-MLZ)J-NSE-20140101 / EXP:(DE-Juel1)SNS-NSE-20150203
                      / EXP:(DE-MLZ)KWS3-20140101 / EXP:(DE-MLZ)KWS2-20140101 /
                      EXP:(DE-MLZ)KWS1-20140101},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/874707},
}