Their contact angle data also indicates that the Young-Lippmann model holds for highly concentrated electrolytes due to the expansion of the purely capacitive region (i.e., the voltage range within which no charge transfer reactions occur) as a consequence of the suppression of the underlying parasitic reactions. On the contrary, at concentrations below the water-in-salt regime, significant deviations from the Young-Lippmann equation are recorded. However, it is difficult to experimentally observe the changes in EDL structure with electrolyte concentration and applied voltage, which is a key element that drives electrowetting at the interface.