Issue |
Europhys. Lett.
Volume 36, Number 7, December I 1996
|
|
---|---|---|
Page(s) | 503 - 508 | |
Section | Classical areas of phenomenology | |
DOI | https://doi.org/10.1209/epl/i1996-00260-6 | |
Published online | 01 September 2002 |
Direct measurement of the translational mobility of deuterium hydride molecules confined in a model microporous material: AlPO4-5 zeolite
1
CRMC -CNRS, Campus de Luminy - Case 901, 13288
Marseille Cedex 9, France
2
Institut Laue-Langevin - 38042 Grenoble Cedex, France
Received:
22
July
1996
Accepted:
18
October
1996
We have measured by incoherent quasi-elastic neutron scattering the diffusion
coefficient Dt of sorbed hydrogen (HD) molecules in the
one-dimensional micropore network of zeolite. The
confined hydrogen phase in such nano-scale cylindrical tubes (diameter
) behaves as a quasi-(1d) fluid phase. At temperature
,
in the medium loading regime
), the translational
molecular mobility is quite large,
. When increasing
, Dt strongly decreases down to
(
). At lower
temperature
, the HD molecular mobility is still important,
at
.
PACS: 47.55.Mh – Flows through porous media / 05.30.-d – Quantum statistical mechanics / 66.10.-x – Diffusion and ionic conduction in liquids
© EDP Sciences, 1996
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