Adsorption isotherms-Microscopic modelling: Part II

Sangaranarayanan, MV and Rangarajan, SK (1984) Adsorption isotherms-Microscopic modelling: Part II. In: Journal of Electroanalytical Chemistry, 176 (1-2). pp. 119-137.

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Abstract

A lattice formahsm using "spin variables" is employed to analyse multi-state models for the adsorption of neutral dipoles.In particular, a spin-1/2 (two-state) model incorporating permanent and reduced dipole moments of the solvent and the organic adsorbate,substrate interactions, and &screteness of charge effects is analysed The resulting Generalized Islng Hamaltonian is solved under mean field approximation (MFA) in order to derive the adsorption isotherm for organic molecules A few spin-1 (three-state) models are also analysed under MFA to describe the competitive adsorption of multi-state solvent and organic dipoles, and the appropriate equilibrium relations are derived The unification and isomorphism existing at the Hamlltonlan level for several diverse realizations, such as adsorption of ions and solvent/orgamc molecules, is indicated The possibility of analysing phase transitions using this generalized approach is briefly indicated.

Item Type:	Journal Article
Publication:	Journal of Electroanalytical Chemistry
Publisher:	Elsevier science
Additional Information:	Copyright for this article belongs to Elsevier science.
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	29 May 2009 09:39
Last Modified:	19 Sep 2010 05:33
URI:	http://eprints.iisc.ac.in/id/eprint/20499

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