% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Keidel:843966,
      author       = {Keidel, Rico and Ghavami, Ali and Lugo, Dersy M. and Lotze,
                      Gudrun and Virtanen, Otto and Beumers, Peter and Pedersen,
                      Jan Skov and Bardow, Andre and Winkler, Roland G. and
                      Richtering, Walter},
      title        = {{T}ime-resolved structural evolution during the collapse of
                      responsive hydrogels: {T}he microgel-to-particle transition},
      journal      = {Science advances},
      volume       = {4},
      number       = {4},
      issn         = {2375-2548},
      address      = {Washington, DC [u.a.]},
      publisher    = {Assoc.},
      reportid     = {FZJ-2018-01484},
      pages        = {eaao7086},
      year         = {2018},
      abstract     = {Adaptive hydrogels, often termed smart materials, are
                      macromolecules whose structure adjusts to external stimuli.
                      Responsive micro- and nanogels are particularly interesting
                      because the small length scale enables very fast response
                      times. Chemical cross-links provide topological constraints
                      and define the three-dimensional structure of the microgels,
                      whereas their porous structure permits fast mass transfer,
                      enabling very rapid structural adaption of the microgel to
                      the environment. The change of microgel structure involves a
                      unique transition from a flexible, swollen finite-size
                      macromolecular network, characterized by a fuzzy surface, to
                      a colloidal particle with homogeneous density and a sharp
                      surface. In this contribution, we determine, for the first
                      time, the structural evolution during the
                      microgel-to-particle transition. Time-resolved small-angle
                      x-ray scattering experiments and computer simulations
                      unambiguously reveal a two-stage process: In a first, very
                      fast process, collapsed clusters form at the periphery,
                      leading to an intermediate, hollowish core-shell structure
                      that slowly transforms to a globule. This structural
                      evolution is independent of the type of stimulus and thus
                      applies to instantaneous transitions as in a temperature
                      jump or to slower stimuli that rely on the uptake of active
                      molecules from and/or exchange with the environment. The
                      fast transitions of size and shape provide unique
                      opportunities for various applications as, for example, in
                      uptake and release, catalysis, or sensing.},
      cin          = {IAS-2 / ICS-2 / JARA-SOFT},
      ddc          = {500},
      cid          = {I:(DE-Juel1)IAS-2-20090406 / I:(DE-Juel1)ICS-2-20110106 /
                      $I:(DE-82)080008_20150909$},
      pnm          = {551 - Functional Macromolecules and Complexes (POF3-551)},
      pid          = {G:(DE-HGF)POF3-551},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:29740608},
      UT           = {WOS:000431374900018},
      doi          = {10.1126/sciadv.aao7086},
      url          = {https://juser.fz-juelich.de/record/843966},
}