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Updated: Jun 20, 2026

In Situ Monitoring of Diffusion of Guest Molecules in Porous Media Using Electron Paramagnetic Resonance Imaging
Published on: September 2, 2016
Ensemble measurement of diffusion: novel beauty and evidence
Christian Chmelik1, Lars Heinke, Pavel Kortunov
1Department of Interface Physics, University of Leipzig, Linnéstr. 5, 04103 Leipzig, Germany.
Abstract:
Recording the evolution of concentration profiles in nanoporous materials opens a new field of diffusion research with particle ensembles. The technique is based on the complementary application of interference microscopy and IR micro-imaging. Combining the virtues of diffusion measurements with solids and fluids, it provides information of unprecedented wealth and visual power on transport phenomena in molecular ensembles. These phenomena include the diverging uptake and release patterns for concentration-dependent diffusivities, the mechanisms of mass transfer at the fluid-solid interface and opposing tendencies in local and global concentration evolution.
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