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Special critical points in multicomponent liquid mixtures: bulk versus surface scenarios

Kumar, A (1996) Special critical points in multicomponent liquid mixtures: bulk versus surface scenarios. In: 38th Annual DAE Solid State Physics Symposium, 27-31 Dec. 1995, Calcutta, India, pp. 742-752.

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Abstract

Diverse condensed matter systems exhibit an appealing phenomenon of reentrant phase transitions. In ternary and quaternary liquid mixtures, the limit of the vanishing reentrance is marked by special critical points, e.g., double critical point (DCP), critical double point (CDP), quadruple critical point (QCP), critical inflection point (CIP) etc. Recent findings concerning the nature of a QCP (in a four-component liquid mixture) and a CDP (in a polymer solution) are presented. The means to develop a unified description of the approach to DCP, QCP and CDP are identified. Arguments are advanced to underline the fundamental differences between special critical points and multicritical points (such as bicritical point, Lifshitz point, tricritical point, tetracritical points, etc.). It is pointed out that an array of problems, which are of basic interest in condensed and soft-condensed matter, can be addressed quantitatively and from a new perspective in the vicinity of special critical points. The richness of these possibilities is established through an example of adsorption-driven flocculation (or aggregation) of charge-stabilized colloids near and away from a DCP (or even a QCP)

Item Type: Conference Paper
Additional Information: Copyright of this article belongs to Council of Scientific Industrial Reserach.
Keywords: adsorption;critical mixtures;critical points;flocculation; liquid mixtures;polymer solutions
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 03 Sep 2007
Last Modified: 10 Jan 2012 07:04
URI: http://eprints.iisc.ernet.in/id/eprint/10797

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