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@ARTICLE{Brodeck:3714,
author = {Brodeck, M. and Alvarez, F. and Arbe, A. and Juranyi, F.
and Unruh, T. and Holderer, O. and Colmenero, J. and
Richter, D.},
title = {{S}tudy of the dynamics of poly(ethylene oxide) by
combining molecular dynamics simulations and neutron
scattering experiments},
journal = {The journal of chemical physics},
volume = {130},
issn = {0021-9606},
address = {Melville, NY},
publisher = {American Institute of Physics},
reportid = {PreJuSER-3714},
pages = {094908},
year = {2009},
note = {We thank A. C. Genix for experimental help in FOCUS. This
work is partially based on experiments performed at the
Swiss spallation neutron source SINQ, Paul Scherrer
Institute, Villigen, Switzerland. This research project was
supported by the European Commission NoE SoftComp under
Contract No. NMP3-CT-2004-502235 and the "Donostia
International Physics Center." A. A., F. A., and J.C.
acknowledge support from Project Nos. MAT2007-63681 and
IT-436-07 (GV) and the Spanish Ministerio de Educacion y
Ciencia (Grant No. CSD2006-53).},
abstract = {We performed quasielastic neutron scattering experiments
and atomistic molecular dynamics simulations on a
poly(ethylene oxide) (PEO) homopolymer system above the
melting point. The excellent agreement found between both
sets of data, together with a successful comparison with
literature diffraction results, validates the
condensed-phase optimized molecular potentials for atomistic
simulation studies (COMPASS) force field used to produce our
dynamic runs and gives support to their further analysis.
This provided direct information on magnitudes which are not
accessible from experiments such as the radial probability
distribution functions of specific atoms at different times
and their moments. The results of our simulations on the
H-motions and different experiments indicate that in the
high-temperature range investigated the dynamics is
Rouse-like for Q-values below approximate to 0.6 A(-1). We
then addressed the single chain dynamic structure factor
with the simulations. A mode analysis, not possible directly
experimentally, reveals the limits of applicability of the
Rouse model to PEO. We discuss the possible origins for the
observed deviations.},
keywords = {J (WoSType)},
cin = {IFF-4 / IFF-5 / JCNS / JCNS (München) ; Jülich Centre for
Neutron Science JCNS (München) ; JCNS-FRM-II},
ddc = {540},
cid = {I:(DE-Juel1)VDB784 / I:(DE-Juel1)VDB785 /
I:(DE-Juel1)JCNS-20121112 /
I:(DE-Juel1)JCNS-FRM-II-20110218},
pnm = {Kondensierte Materie / Großgeräte für die Forschung mit
Photonen, Neutronen und Ionen (PNI)},
pid = {G:(DE-Juel1)FUEK414 / G:(DE-Juel1)FUEK415},
experiment = {EXP:(DE-MLZ)J-NSE-20140101 / EXP:(DE-MLZ)TOF-TOF-20140101},
shelfmark = {Physics, Atomic, Molecular $\&$ Chemical},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000264522900036},
doi = {10.1063/1.3077858},
url = {https://juser.fz-juelich.de/record/3714},
}