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# Determination of the zeta potential for highly charged colloidal suspensions

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### Abstract

We compute the electrostatic potential at the surface, or zeta potential $$\zeta$$, of a charged particle embedded in a colloidal suspension using a hybrid mesoscopic model. We show that for weakly perturbing electric fields, the value of $$\zeta$$ obtained at steady state during electrophoresis is statistically indistinguishable from $$\zeta$$ in thermodynamic equilibrium. We quantify the effect of counterions concentration on $$\zeta$$. We also evaluate the relevance of the lattice resolution for the calculation of $$\zeta$$ and discuss how to identify the effective electrostatic radius.

### Author and article information

###### Journal
24 February 2011
###### Article
10.1098/rsta.2011.0024
1102.4918