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Poisson-Boltzmann cell model for heterogeneously charged colloids
Phys. Rev. E 80, 041402 – Published 27 October, 2009
DOI: https://doi.org/10.1103/PhysRevE.80.041402
Abstract
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 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 liquidlike with respect to translational degrees of freedom are also isotropic with respect to particle orientation.
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