% 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”.

@INPROCEEDINGS{Zorn:1023111,
      author       = {Zorn, Reiner},
      title        = {{Q}uasielastic neutron scattering experiments on confined
                      glass-forming liquids},
      school       = {Institut Laue-Langevin},
      reportid     = {FZJ-2024-01681},
      year         = {2022},
      abstract     = {The explanation of the dynamics of glass-forming materials
                      is a still unsolved problem in solid state theory. My
                      collaboration with Bernhard Frick started in 1990 when
                      quasielastic neutron scattering (QENS) was beginning to be
                      employed on such systems. At that time, experiments mostly
                      aimed at scrutinizing Mode Coupling Theory (MCT) and were
                      done on bulk systems because this theory does not explicitly
                      include a length scale. After first successes, the
                      limitations of MCT became clearer over the years and
                      alternative concepts were sought. One of these is that of
                      Cooperatively Rearranging Regions (CRR) of the size of some
                      nanometers. An obvious way to test the importance of CRRs is
                      to confine the sample to that size and look for changes in
                      the dynamics. By the mid-90s materials became available with
                      suited pore sizes, Controlled Porous Glasses (CPG). We
                      immediately started the QENS experiments on simple liquids
                      confined in CPGs, later extending them to polymers and
                      liquid crystals in a cooperation with Andreas Schönhals who
                      provided additional methods allowing an enormous increase in
                      dynamical range. The experiments showed that the basic
                      predictions of a CRR model are fulfilled but surface effects
                      modify the dynamics significantly. To reduce these,
                      experiments were done in ‘soft confinement’, i.e.,
                      microemulsions which confine the glass-forming liquid in
                      droplets. These experiments gave a clearer support to CRR
                      ideas but also turned out to be much more complicated in
                      their interpretation because the ‘matrix’ material is
                      not immobile.},
      month         = {Oct},
      date          = {2022-10-11},
      organization  = {5th International Workshop on Dynamics
                       in Confinement, Grenoble (France), 11
                       Oct 2022 - 13 Oct 2022},
      subtyp        = {Invited},
      cin          = {JCNS-1 / IBI-8},
      cid          = {I:(DE-Juel1)JCNS-1-20110106 / I:(DE-Juel1)IBI-8-20200312},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632) / 6G4 - Jülich Centre for Neutron
                      Research (JCNS) (FZJ) (POF4-6G4) / 5241 - Molecular
                      Information Processing in Cellular Systems (POF4-524) / 5251
                      - Multilevel Brain Organization and Variability (POF4-525)},
      pid          = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G4 /
                      G:(DE-HGF)POF4-5241 / G:(DE-HGF)POF4-5251},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/1023111},
}