Entropically Driven Surface Phase Separation in Binary Colloidal Mixtures

P. D. Kaplan; J. L. Rouke; A. G. Yodh; D. J. Pine

doi:10.1103/PhysRevLett.72.582

Entropically Driven Surface Phase Separation in Binary Colloidal Mixtures

P. D. Kaplan, J. L. Rouke, A. G. Yodh, D. J. Pine

Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

We investigate the phase diagram of mixtures of charge stabilized polystyrene spheres of two different sizes in the hard-sphere limit. We observe bulk phase separation into two disordered phases and find a new ordered phase located on the cell walls. The ordered phase occurs at volume fractions as low as 0.2, much less than the value of 0.49 for hard-sphere freezing in monodisperse suspensions, and is qualitatively explained with simple geometric arguments.

Original language	English (US)
Pages (from-to)	582-585
Number of pages	4
Journal	Physical Review Letters
Volume	72
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevLett.72.582
State	Published - 1994

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.72.582

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abstract = "We investigate the phase diagram of mixtures of charge stabilized polystyrene spheres of two different sizes in the hard-sphere limit. We observe bulk phase separation into two disordered phases and find a new ordered phase located on the cell walls. The ordered phase occurs at volume fractions as low as 0.2, much less than the value of 0.49 for hard-sphere freezing in monodisperse suspensions, and is qualitatively explained with simple geometric arguments.",

author = "Kaplan, {P. D.} and Rouke, {J. L.} and Yodh, {A. G.} and Pine, {D. J.}",

year = "1994",

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AB - We investigate the phase diagram of mixtures of charge stabilized polystyrene spheres of two different sizes in the hard-sphere limit. We observe bulk phase separation into two disordered phases and find a new ordered phase located on the cell walls. The ordered phase occurs at volume fractions as low as 0.2, much less than the value of 0.49 for hard-sphere freezing in monodisperse suspensions, and is qualitatively explained with simple geometric arguments.

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Entropically Driven Surface Phase Separation in Binary Colloidal Mixtures

Abstract

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