Poisson-Boltzmann cell model for heterogeneously charged colloids

Details Poisson-Boltzmann cell model for heterogeneously charged colloids Poisson-Boltzmann cell model for heterogeneously charged colloids

2009-07-07

arxiv.org/abs/0907.1208v1

Physics

Condensed Matter

Soft Condensed Matter

9 pages, 3 figures

Scientific paper

We introduce the Poisson-Boltzmann cell model for spherical colloidal particles with a heterogeneous surface charge distribution. This model is obtained by generalizing existing cell models for mixtures of homogeneously charged colloidal spheres. Our new model has similar features as Onsager's second-virial theory for liquid crystals, but it predicts no orientational ordering if there is no positional ordering. This implies that all phases of heterogeneously charged colloids that are liquid-like with respect to translational degrees of freedom are also isotropic with respect to particle orientation.

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