The Foam Analogy in Charged Colloidal Crystals

Details The Foam Analogy in Charged Colloidal Crystals The Foam Analogy in Charged Colloidal Crystals

2001-11-16

arxiv.org/abs/cond-mat/0111313v2

Phys. Rev. E 65 (2002) 050401

Physics

Condensed Matter

Soft Condensed Matter

4 pages, RevTeX, one included eps figure, typos corrected

Scientific paper

10.1103/PhysRevE.65.050401

We model charged colloidal suspensions using an analogy with foams. We study the solid--solid phase transitions of these systems as a function of particle volume-fraction and ionic strength. The screened Coulomb interaction is replaced by an interaction between walls of the Voronoi cells around each particle. We fit the surface charge to reproduce the phase diagram for the charged suspension studied by Sirota, et al. [Phys. Rev. Lett. 62, 1524 (1989)]. With this fit parameter we are able to calculate the elastic moduli of the system and find good agreement with the available data.

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