% 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{Chua:1005108,
      author       = {Chua, Yeong Zen and Zorn, Reiner and Schmelzer, Jürn W. P.
                      and Schick, Christoph and Holderer, Olaf and Zamponi,
                      Michaela},
      title        = {{D}etermination of {C}ooperativity {L}ength in a
                      {G}lass-{F}orming {P}olymer},
      journal      = {ACS physical chemistry Au},
      volume       = {3},
      number       = {2},
      issn         = {2694-2445},
      address      = {Washington, DC},
      publisher    = {American Chemical Society},
      reportid     = {FZJ-2023-01307},
      pages        = {172–180},
      year         = {2023},
      abstract     = {To describe the properties of glass-forming liquids, the
                      concepts of a cooperativity length or the size of
                      cooperatively rearranging regions are widely employed. Their
                      knowledge is of outstanding importance for the understanding
                      of both thermodynamic and kinetic properties of the systems
                      under consideration and the mechanisms of crystallization
                      processes. By this reason, methods of experimental
                      determination of this quantity are of outstanding
                      importance. Proceeding in this direction, we determine the
                      so-called cooperativity number and, based on it, the
                      cooperativity length by experimental measurements utilizing
                      AC calorimetry and quasi-elastic neutron scattering (QENS)
                      at comparable times. The results obtained are different in
                      dependence on whether temperature fluctuations in the
                      considered nanoscale subsystems are either accounted for or
                      neglected in the theoretical treatment. It is still an open
                      question, which of these mutually exclusive approaches is
                      the correct one. As shown in the present paper on the
                      example of poly(ethyl methacrylate) (PEMA), the cooperative
                      length of about 1 nm at 400 K and a characteristic time of
                      ca. 2 μs determined from QENS coincide most consistently
                      with the cooperativity length determined from AC calorimetry
                      measurements if the effect of temperature fluctuations is
                      incorporated in the description. This conclusion indicates
                      that─accounting for temperature fluctuations─the
                      characteristic length can be derived by thermodynamic
                      considerations from the specific parameters of the liquid at
                      the glass transition and that temperature does fluctuate in
                      small subsystems.},
      cin          = {JCNS-1 / IBI-8 / JCNS-4 / JCNS-FRM-II / MLZ},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JCNS-1-20110106 / I:(DE-Juel1)IBI-8-20200312 /
                      I:(DE-Juel1)JCNS-4-20201012 /
                      I:(DE-Juel1)JCNS-FRM-II-20110218 / I:(DE-588b)4597118-3},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632) / 6G4 - Jülich Centre for Neutron
                      Research (JCNS) (FZJ) (POF4-6G4)},
      pid          = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G4},
      experiment   = {EXP:(DE-MLZ)J-NSE-20140101 / EXP:(DE-MLZ)SPHERES-20140101},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {36968449},
      UT           = {WOS:001006819300001},
      doi          = {10.1021/acsphyschemau.2c00057},
      url          = {https://juser.fz-juelich.de/record/1005108},
}