Phase transitions at interfaces: Flocculation of charge stabilised colloids in liquid mixtures
An intriguing phenomenon of reversible flocculation of charge-stabilised colloids in liquid mixtures is described. Some recent results concerning the shape of the flocculation surface, especially near special critical points (e.g. a double critical point, DCP), are also discussed. The findings regarding the kinetics of aggregation/fragmentation have been reviewed. The theoretical efforts behind the mechanism of this phenomenon (e.g. prewetting, capillary condensation, adsoprtion-driven secondary minimum in the interparticle DLVO potential, Casimir forces, etc.) are outlined. The role of special critical points (e.g. a DCP or a quadruple critical point, QCP) in elucidating several key features of the above phenomenon is underlined. Several challenging problems in this emerging area that demand attention, are pointed out.
Year of publication: |
1996
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Authors: | Kumar, A. ; Beysens, D. |
Published in: |
Physica A: Statistical Mechanics and its Applications. - Elsevier, ISSN 0378-4371. - Vol. 224.1996, 1, p. 68-73
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Publisher: |
Elsevier |
Saved in:
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