Fig. 5. Diffusioosmosis of a divalent electrolyte with ion diffusivity ratio β = −0.1. The channel surface charge density q = 0.014 C m−2 corresponds to a channel surface potential ζ = 50 mV at a bulk electrolyte molar concentration C = 10−3 M. Panels (a), (c), and (e) ignore ion–ion electrostatic correlations (δc = 0). Panels (b), (d), and (f) account for electrostatic correlations (δc = κlc). Other figure captions are the same as those in Fig. 3.
