A mode coupling theory analysis of microscopic friction in the macroscopic limit

Bhattacharyya, Sarika Maitra (2004) A mode coupling theory analysis of microscopic friction in the macroscopic limit. In: Chemical Physics Letters, 386 (1-3). pp. 83-88.

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Abstract

In order to understand the physical origin of the cross-over of solute di.usion to the hydrodynamic regime, we present an analytical and numerical calculation of the microscopic friction obtained from the mode coupling theory (MCT) at the limit of large solute size. In this limit we have shown that in the MCT expression of the microscopic friction/di.usion the contribution from the density mode vanishes and the current contribution to the di.usion reduces to the famous Stokes–Einstein form. Our numerical calculation shows that along with the size of the solute if we accordingly change the mass and the solute–solvent interaction parameters then cross-over to the current dominated regime happens early.

Item Type:	Journal Article
Publication:	Chemical Physics Letters
Publisher:	Elsevier
Additional Information:	The copyright belongs to Elsevier.
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	27 May 2006
Last Modified:	19 Sep 2010 04:27
URI:	http://eprints.iisc.ac.in/id/eprint/6964

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