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@ARTICLE{Chua:828444,
author = {Chua, Y. Z. and Zorn, Reiner and Holderer, Olaf and
Schmelzer, J. W. P. and Schick, C. and Donth, E.},
title = {{T}emperature fluctuations and the thermodynamic
determination of the cooperativity length in glass forming
liquids},
journal = {The journal of chemical physics},
volume = {146},
issn = {0021-9606},
address = {Melville, NY},
publisher = {American Institute of Physics},
reportid = {FZJ-2017-02403},
pages = {104501},
year = {2017},
note = {doi does not work (24.3.2017)},
abstract = {The aim of this paper is to decide which of the two
possible thermodynamic expressions for the cooperativity
length in glass forming liquids is the correct one. In the
derivation of these two expressions, the occurrence of
temperature fluctuations in the considered nanoscale
subsystems is either included or neglected. Consequently,
our analysis gives also an answer to the widely discussed
problem whether temperature fluctuations have to be
generally accounted for in thermodynamics or not. To this
end, the characteristic length-scales at equal times and
temperatures for propylene glycol were determined
independently from AC calorimetry in both the above
specified ways and from quasielastic neutron scattering
(QENS), and compared. The result shows that the cooperative
length determined from QENS coincides most consistently with
the cooperativity length determined from AC calorimetry
measurements for the case that 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 glass transition and that temperature does
fluctuate in small systems.I. INTRODUCTION},
cin = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
(München) ; JCNS-FRM-II / Neutronenstreuung ; JCNS-1},
ddc = {540},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-1-20110106},
pnm = {6215 - Soft Matter, Health and Life Sciences (POF3-621) /
6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
Neutron Research (JCNS) (POF3-623)},
pid = {G:(DE-HGF)POF3-6215 / G:(DE-HGF)POF3-6G15 /
G:(DE-HGF)POF3-6G4},
experiment = {EXP:(DE-MLZ)J-NSE-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000397313300023},
doi = {10.1063/1.4977737},
url = {https://juser.fz-juelich.de/record/828444},
}