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Dr. Lars Heinke

Priv.-Doz. Dr. Lars Heinke

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Looking into the Crystallites: Diffusion Studies by Interference Microscopy

Looking into the Crystallites: Diffusion Studies by Interference Microscopy
Autor:

Kärger, J. / Heinke, L. / Kortunov, P. / Vasenkov, S. (2007)

Quelle:

Studies in Surface Science Catalysis 170 (2007), 739–747

Datum: 2007

Kärger, J. / Heinke, L. / Kortunov, P. / Vasenkov, S. (2007): „Looking into the Crystallites: Diffusion Studies by Interference Microscopy“. In: Studies in Surface Science Catalysis 170 (2007), 739–747

Abstract

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Application of Interference Microscopy to monitor transient concentration profiles in nanoporous crystals is shown to provide a unique and unprecedented option for exploring their transport properties. We present three most recent implementations of this technique, namely the discovery of one-dimensional diffusion following the patterns of site-to-site hopping in MOF manganese formate, the exploration of diffusivities in the two-dimensional channel network of Ferrierite over two orders of magnitude and the direct diffusion measurement in the three principal directions of zeolite STA-7. Special emphasis is given on the problem-related procedure for deducing the relevant micro-physical information from the primary data.