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@ARTICLE{Acosta:51634,
author = {Acosta, R. H. and Agulles-Pedrós, L. and Komin, S. and
Sebastianai, D. and Spiess, H. W. and Blümler, P.},
title = {{D}iffusion in binary gas mixtures studied by {NMR} of
hyperpolarized gases and molecular dynamic simulations},
journal = {Physical Chemistry Chemical Physics},
volume = {8},
issn = {1463-9076},
address = {Cambridge},
publisher = {RSC Publ.},
reportid = {PreJuSER-51634},
pages = {4182 - 4188},
year = {2006},
note = {Record converted from VDB: 12.11.2012},
abstract = {The dependence of the individual mean square displacement
of rare gases in binary mixtures is studied by a combined
experimental and theoretical approach. We show that the
diffusion constant can be varied in a considerable range by
changing the molar fractions of the mixtures. On the
experimental side, NMR diffusion measurements are done on
hyperpolarized 3He and 129Xe, mixed with several inert
buffer gases, in the presence of a magnetic field gradient.
The results are compared to diffusion coefficients obtained
from atomistic molecular dynamics simulations based on
Lennard-Jones type potentials of the corresponding gas
mixtures, and to appropriate analytical expressions,
yielding very good mutual agreement. This study is the first
quantitative validation of the effects of the mutual
interactions between gas particles on the individual
diffusion properties. It is shown that the dependency of gas
phase diffusion properties on the local chemical environment
may not be neglected, e.g. in diffusion-controlled chemical
reactions.},
keywords = {Complex Mixtures: analysis / Complex Mixtures: chemistry /
Computer Simulation / Diffusion / Gases: analysis / Gases:
chemistry / Magnetic Resonance Spectroscopy: methods /
Models, Chemical / Models, Molecular / Molecular Weight /
Particle Size / Static Electricity / Complex Mixtures (NLM
Chemicals) / Gases (NLM Chemicals) / J (WoSType)},
cin = {ICG-III},
ddc = {540},
cid = {I:(DE-Juel1)VDB49},
pnm = {Terrestrische Umwelt},
pid = {G:(DE-Juel1)FUEK407},
shelfmark = {Chemistry, Physical / Physics, Atomic, Molecular $\&$
Chemical},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:16971986},
UT = {WOS:000240545000004},
doi = {10.1039/b609316g},
url = {https://juser.fz-juelich.de/record/51634},
}