Electroosmosis as a probe for electrostatic correlations – Archive ouverte HAL

Ivan PalaiaIgor M. TellesAlexandre P. Dos SantosEmmanuel Trizac 1

Ivan Palaia, Igor M. Telles, Alexandre P. Dos Santos, Emmanuel Trizac. Electroosmosis as a probe for electrostatic correlations. Soft Matter, Royal Society of Chemistry, 2021. ⟨hal-03223905⟩

We study the role of ionic correlations on the electroosmotic flow in planar double-slit channels, without salt. We propose an analytical theory, based on recent advances in the understanding of correlated systems. We compare the theory with mean-field results and validate it by means of dissipative particle dynamics simulations. Interestingly, for some surface separations, correlated systems exhibit a larger flow than predicted by mean-field. We conclude that the electroosmotic properties of a charged system can be used, in general, to infer and weight the importance of electrostatic correlations therein.

  • 1. LPTMS - Laboratoire de Physique Théorique et Modèles Statistiques