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Classification of the third regime in the size dependence of self diffusivity in levitation effect

Ghorai, Pradip Kr and Yashonath, S (2005) Classification of the third regime in the size dependence of self diffusivity in levitation effect. In: Chemical Physics Letters, 402 (1-3). pp. 222-226.

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Official URL: http://dx.doi.org/10.1016/j.cplett.2004.11.086

Abstract

Previously reported size dependent maximum in self diffusivity D of a sorbate confined to zeolite faujasite has been analysed to understand the nature of the third regime where the sorbate diameter is comparable to the void diameter. In the third regime self diffusivity decreases rapidly with increase in sorbate diameter. Activation energy of the particles in regime III is comparable to those in regime II rather than regime I suggesting that the region III should be classified as belonging to regime II (also known as the anomalous regime) rather than regime I (the linear regime) where $D \hspace {2mm} \propto 1/ \sigma^2 _{gg}, \sigma_{gg}$ being the sorbate diameter.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 17 Mar 2006
Last Modified: 01 Mar 2012 10:04
URI: http://eprints.iisc.ernet.in/id/eprint/5842

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