Hobbie, E.
(1999),
Depletion-Driven Phase Separation and Reversible Aggregation in Confined Colloidal Mixtures, Langmuir, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=851547
(Accessed June 10, 2023)
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Depletion-Driven Phase Separation and Reversible Aggregation in Confined Colloidal Mixtures
Published
Author(s)
Abstract
The kinetics of depletion-driven size segregation in confined binary mixtures of nearly-hard-sphere colloids are studied with video microscopy. During the transient fluid-fluid phase separation that occurs as an intermediate step in the formation of isolated large-sphere-crystallites, the structure factor of the (larger)minority component exhibits a spinodal-like evoluation, while the cluster-size distribution exhibits scaling reminiscent of colloidal aggregation. The scaled distributions show a crossover from power-law (x1) behavior, where x=k/s is the ratio of cluster-size index to average cluster size. A phenomenological explanation based on the reversible Smoluchowski equation is proposed.Citation
Langmuir
Volume
15
Issue
No. 26
Pub Type
Journals
Download Paper
Keywords
colloidal aggregation, dupletion force
Citation
Created December 1, 1999, Updated June 2, 2021