Figure 1.
Pictorial representation of the discrete-charge Ising model. Solid circles represent the ionizable sites, which are assumed to be arranged within dielectric medium with a dielectric constant ɛd. This dielectric is in contact with an aqueous electrolyte solution with a dielectric constant ɛw and a Debye screening length κ−1. (a) The water–solid interface is modeled by a planar geometry with ionizable sites arranged on a regular, two-dimensional lattice. (b) The linear polyelectrolyte is modeled by arranging the ionizable sites equidistantly along the cylinder axis.