Interaction between charged rodlike colloidal particles

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Abstract
The interactions and correlations of charged rodlike colloidal particles are investigated using an ab initio approach which includes many-body inter-rod forces induced by nonlinear counterion screening. It is found that these forces can satisfactorily be described by an effective Yukawa segment model which in general differs from the traditional Derjaguin-Landau-Verwey-Overbeek theory. Whereas no simple analytical expression for the Yukawa parameters is available for the disordered phase, an exactly soluble cylindrical cell model reproduces the ab initio data quite well in the liquid-crystalline phase.