Extended Data Fig. 5: Linear dependence of G-band Raman shift on applied voltage in both the two-terminal and three-terminal configurations.
From: Asymmetric response of interfacial water to applied electric fields

A two-terminal voltage (applied versus glassy carbon) can be converted to a voltage versus Ag/Cl in the three-terminal configuration by exploiting the linearity of the G-band shift with respect to the applied voltage.