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@ARTICLE{Faraone:201678,
      author       = {Faraone, Antonio and Hong, Kunlun and Kneller, Larry R. and
                      Ohl, Michael and Copley, John R. D.},
      title        = {{C}oherent dynamics of meta-toluidine investigated by
                      quasielastic neutron scattering},
      journal      = {The journal of chemical physics},
      volume       = {136},
      number       = {10},
      issn         = {0021-9606},
      address      = {Melville, NY},
      publisher    = {American Institute of Physics},
      reportid     = {FZJ-2015-03972},
      pages        = {104502 -},
      year         = {2012},
      abstract     = {The coherent dynamics of a typical fragile glass former,
                      meta-toluidine, was investigated at the molecular level
                      using quasielastic neutron scattering, with time-of-flight
                      and neutron spin echo spectrometers. It is well known that
                      the static structure factor of meta-toluidine shows a
                      prepeak originating from clustering of the molecules through
                      hydrogen bonding between the amine groups. The dynamics of
                      meta-toluidine was measured for several values of the
                      wavevector transfer Q, which is equivalent to an inverse
                      length scale, in a range encompassing the prepeak and the
                      structure factor peak. Data were collected in the
                      temperature range corresponding to the liquid and
                      supercooled states, down to the glass transition. At least
                      two dynamical processes were identified. This paper focuses
                      on the slowest relaxation process in the system, the
                      α-relaxation, which was found to scale with the macroscopic
                      shear viscosity at all the investigated Q values. No
                      evidence of “de Gennes” narrowing associated with the
                      prepeak was observed, in contrast with what happens at the Q
                      value corresponding to the interparticle distance. Moreover,
                      using partially deuterated samples, the dynamics of the
                      clusters was found to be correlated to the single-particle
                      dynamics of the meta-toluidine molecules.},
      cin          = {ICS-1 / Neutronenstreuung ; JCNS-1 / JCNS-SNS},
      ddc          = {540},
      cid          = {I:(DE-Juel1)ICS-1-20110106 / I:(DE-Juel1)JCNS-1-20110106 /
                      I:(DE-Juel1)JCNS-SNS-20110128},
      pnm          = {451 - Soft Matter Composites (POF2-451) / 54G - JCNS
                      (POF2-54G24)},
      pid          = {G:(DE-HGF)POF2-451 / G:(DE-HGF)POF2-54G24},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000301664600023},
      doi          = {10.1063/1.3691185},
      url          = {https://juser.fz-juelich.de/record/201678},
}