show below: at this concentration, the effect of the adsorbed Cl -anions on the surface tension is negligible and the electrowetting effect is dominated by water. For higher concentrations (2 and 4 M) we find that the negatively charged surface is more hydrophilic than the neutral surface. For the positively charged surface, the value of becomes negative, which indicates that the electrode surface is completely wet. In general, decreases as the concentration of LiCl increases. This phenomenon starts to become evident for concentrations above 2 M, where the value has a significant drop. Once again, this drop is significantly higher at the positive potential compared to the negatively charged surface. To gain a better understanding of the ionic contribution to the observed trend in , we plot the water-only (calculated including merely the van der Waals and coulomb interactions between water molecules and among water molecules and the electrode) and the ion-only (the difference between total and the water contribution to the ) contributions to as a function of ionic concentration (Figure ).