Abstract
The application of interference microscopy (IFM) and infrared microscopy (IRM) to monitoring transient concentration profiles during uptake and release of guest molecules in nanoporous materials has opened a novel technique for diffusion studies with adsorbed molecules. For the first time, the coefficients of transport diffusion and the surface permeabilities have become accessible by direct observation under non-equilibrium conditions. The examples presented in this communication include diffusion and permeation measurements with zeolites of the ferrierite type and with metal-organic frameworks (MOFs) of type ZIF-8
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Chmelik, C., Kärger, J. Imaging of transient guest profiles in nanoporous host materials: a new experimental technique to study intra-crystalline diffusion. Adsorption 16, 515–523 (2010). https://doi.org/10.1007/s10450-010-9264-8
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DOI: https://doi.org/10.1007/s10450-010-9264-8