Interfacial, Electroviscous, and Nonlinear Dielectric Effects on Electrokinetics at Highly Charged Surfaces

• DOI: 10.1021/acs.jpcb.0c11280
• Publication Date: 2021-05-03T19:51:58Z
• Authors: Majid Rezaei; Bernhard G. Mitte...; Philip Loche; Yuki Uematsu; Roland R. Netz; Douwe Jan Bonthuis
• Keywords: Electrostriction; Poisson–Boltzmann equation; Streaming current

The dielectric constant and the viscosity of water at interface hydrophilic surfaces differ from their bulk values, it has been proposed that deviation is caused by strong electric field high ion concentration in interfacial layer. We calculate dependence electrolytes on salt concentration. Incorporating field-dependent extended Poisson–Boltzmann Stokes equations, we electro-osmotic mobility. compare results to literature experimental data explicit molecular dynamics simulations OH-terminated show necessary additionally include presence a subnanometer wide layer, properties which are drastically transformed sheer interface. conclude origin anomalous behavior aqueous layers cannot be found electrostriction or electroviscous effects Instead, primarily intrinsic ordering orientation