Phase Separation in Binary Nearly-Hard-Sphere Colloids: Evidence for the Depletion Force

Sanyal, S and Easwar, N and Ramaswamy, S and Sood, AK (1992) Phase Separation in Binary Nearly-Hard-Sphere Colloids: Evidence for the Depletion Force. In: EPL: Europhysics Letters, 18 (2BIS). pp. 107-110.

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Abstract

A binary aqueous suspension of large (L) and small (S) nearly-hard-sphere colloidal polystyrene spheres is shown to segregate spontaneously into L-rich and S-rich regions for suitable choices of volume fraction and size ratio. This is the first observation of such purely entropic phase separation of chemically identical species in which at least one component remains fluid. Simple theoretical arguments are presented to make this effect plausible.

Item Type:	Journal Article
Publication:	EPL: Europhysics Letters
Publisher:	EDP Sciences.
Additional Information:	Copyright of this article belongs to EDP Sciences.
Department/Centre:	Division of Physical & Mathematical Sciences > Centre for Theoretical Studies (Ceased to exist at the end of 2003)
Date Deposited:	02 May 2011 05:32
Last Modified:	02 May 2011 05:32
URI:	http://eprints.iisc.ac.in/id/eprint/37299

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