Details
| Original language | English |
|---|---|
| Article number | 085902 |
| Journal | Physical review letters |
| Volume | 104 |
| Issue number | 8 |
| Publication status | Published - 25 Feb 2010 |
Abstract
Diffusion is known to be quantified by measuring the rate of molecular fluxes in the direction of falling concentration. In contrast with intuition, considering methanol diffusion in a novel type of nanoporous material (MOF ZIF-8), this rate has now been found to be enhanced rather than slowed down by an opposing flux of labeled molecules. In terms of the key quantities of random particle movement, this result means that the self-diffusivity exceeds the transport diffusivity. It is rationalized by considering the strong intermolecular interaction and the dominating role of intercage hopping in mass transfer in the systems under study.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
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In: Physical review letters, Vol. 104, No. 8, 085902, 25.02.2010.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Mass transfer in a nanoscale material enhanced by an opposing flux
AU - Chmelik, Christian
AU - Bux, Helge
AU - Caro, Jürgen
AU - Heinke, Lars
AU - Hibbe, Florian
AU - Titze, Tobias
AU - Kärger, Jörg
PY - 2010/2/25
Y1 - 2010/2/25
N2 - Diffusion is known to be quantified by measuring the rate of molecular fluxes in the direction of falling concentration. In contrast with intuition, considering methanol diffusion in a novel type of nanoporous material (MOF ZIF-8), this rate has now been found to be enhanced rather than slowed down by an opposing flux of labeled molecules. In terms of the key quantities of random particle movement, this result means that the self-diffusivity exceeds the transport diffusivity. It is rationalized by considering the strong intermolecular interaction and the dominating role of intercage hopping in mass transfer in the systems under study.
AB - Diffusion is known to be quantified by measuring the rate of molecular fluxes in the direction of falling concentration. In contrast with intuition, considering methanol diffusion in a novel type of nanoporous material (MOF ZIF-8), this rate has now been found to be enhanced rather than slowed down by an opposing flux of labeled molecules. In terms of the key quantities of random particle movement, this result means that the self-diffusivity exceeds the transport diffusivity. It is rationalized by considering the strong intermolecular interaction and the dominating role of intercage hopping in mass transfer in the systems under study.
UR - http://www.scopus.com/inward/record.url?scp=77649154358&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.104.085902
DO - 10.1103/PhysRevLett.104.085902
M3 - Article
AN - SCOPUS:77649154358
VL - 104
JO - Physical review letters
JF - Physical review letters
SN - 0031-9007
IS - 8
M1 - 085902
ER -