ENTROPICALLY DRIVEN SURFACE PHASE-SEPARATION IN BINARY COLLOIDAL MIXTURES

Authors
KAPLAN PD ROUKE JL YODH AG PINE DJ
Citation
Pd. Kaplan et al., ENTROPICALLY DRIVEN SURFACE PHASE-SEPARATION IN BINARY COLLOIDAL MIXTURES, Physical review letters, 72(4), 1994, pp. 582-585
Citations number
20
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
72
Issue
4
Year of publication
1994
Pages
582 - 585
Database
ISI
SICI code
0031-9007(1994)72:4<582:EDSPIB>2.0.ZU;2-7
Abstract
We investigate the phase diagram of mixtures of charge stabilized poly styrene spheres of two different sizes in the hard-sphere limit. We ob serve bulk phase separation into two disordered phases and find a new ordered phase located on the cell walls. The ordered phase occurs at v olume fractions as low as 0.2, much less than the value of 0.49 for ha rd-sphere freezing in monodisperse suspensions, and is qualitatively e xplained with simple geometric arguments.