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Updated: Jun 14, 2026

Flow-assisted Dielectrophoresis: A Low Cost Method for the Fabrication of High Performance Solution-processable Nanowire Devices
Published on: December 7, 2017
Mass transfer in a nanoscale material enhanced by an opposing flux
Christian Chmelik1, Helge Bux, Jürgen Caro
1Leipzig University, Faculty of Physics and Geosciences, Linnéstrasse 5, D-04103 Leipzig, Germany. chmelik@physik.uni-leipzig.de
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.
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