“…Indeed, correlations between the charged species may have to be taken into account to describe the highly charged surface of CSH in concentrated electrolytic solutions. For instance, the anisotropic hypernetted chain (AHNC) theory, which considers electrostatic and steric interactions between charged species, predicts an "effective" surface charge, that is the charge "seen" by ions situated at a large distance from the charged interface, depending strongly on the diameter of the counterions (28), especially at high surface charge. The larger the counterions, the higher the effective surface charge calculated by the AHNC theory, compared to that calculated by neglecting the correlation effects, which leads to an increase in the diffuse-layer potential.…”