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@ARTICLE{Helminger:155901,
      author       = {Helminger, Maria and Wu, Baohu and Kollmann, Tina and
                      Benke, Dominik and Schwahn, Dietmar and Pipich, Vitaliy and
                      Faivre, Damien and Zahn, Dirk and Cölfen, Helmut},
      title        = {{S}ynthesis and {C}haracterization of {G}elatin-{B}ased
                      {M}agnetic {H}ydrogels},
      journal      = {Advanced functional materials},
      volume       = {24},
      number       = {21},
      issn         = {1616-301X},
      address      = {Weinheim},
      publisher    = {Wiley-VCH},
      reportid     = {FZJ-2014-04835},
      pages        = {3187 - 3196},
      year         = {2014},
      abstract     = {A simple preparation of thermoreversible gelatin-based
                      ferrogels in water provides a constant structure defined by
                      the crosslinking degree for gelatin contents between 6 and
                      18 $wt\%.$ The possibility of varying magnetite nanoparticle
                      concentration between 20 and 70 $wt\%$ is also reported.
                      Simulation studies hint at the suitability of collagen to
                      bind iron and hydroxide ions, suggesting that collagen acts
                      as a nucleation seed to iron hydroxide aggregation, and thus
                      the intergrowth of collagen and magnetite nanoparticles
                      already at the precursor stage. The detailed structure of
                      the individual ferrogel components is characterized by
                      small-angle neutron scattering (SANS) using contrast
                      matching. The magnetite structure characterization is
                      supplemented by small-angle X-ray scattering and microscopy
                      only visualizing magnetite. SANS shows an unchanged gelatin
                      structure of average mesh size larger than the nanoparticles
                      with respect to gel concentration while the magnetite
                      nanoparticles size of around 10 nm seems to be limited by
                      the gel mesh size. Swelling measurements underline that
                      magnetite acts as additional crosslinker and therefore
                      varying the magnetic and mechanical properties of the
                      ferrogels. Overall, the simple and variable synthesis
                      protocol, the cheap and easy accessibility of the components
                      as well as the biocompatibility of the gelatin-based
                      materials suggest them for a number of applications
                      including actuators.},
      cin          = {ICS-1 / Neutronenstreuung ; JCNS-1 / JCNS (München) ;
                      Jülich Centre for Neutron Science JCNS (München) ;
                      JCNS-FRM-II},
      ddc          = {620},
      cid          = {I:(DE-Juel1)ICS-1-20110106 / I:(DE-Juel1)JCNS-1-20110106 /
                      I:(DE-Juel1)JCNS-FRM-II-20110218},
      pnm          = {451 - Soft Matter Composites (POF2-451) / 54G - ANKA
                      (POF2-54G11)},
      pid          = {G:(DE-HGF)POF2-451 / G:(DE-HGF)POF2-54G11},
      experiment   = {EXP:(DE-MLZ)KWS1-20140101 / EXP:(DE-MLZ)KWS3-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000337489400014},
      doi          = {10.1002/adfm.201303547},
      url          = {https://juser.fz-juelich.de/record/155901},
}