Fig. 6

a Effect of the ionic strength of NaCl on zeta potential for flat Ti foil. Experimental values are denoted by green circles. The simulated data are denoted by the dashed line with black crosses. b Dependence of the distance x _z (position of the slip plane, see Fig. 7) on the NaCl concentration used in calculations presented in the upper panel. The parameters used in simulations are σ = −0.05 As/m², α _- = 12, and α ₊ = 8. Parameters α ₋ and α ₊ describe the relative size of anions and cations, respectively (see Appendix)