Differential Capacitance of the Ga Subgroup Metals Caused
by Reorientation of Solvent Molecules on the Metal Surfaces
and Its Dependence on the Charge

V. E. Kazarinov and I. A. Bagotskaya

Frumkin Institute of Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 117071 Russia

Received November 16, 1995

Abstract—By the example of the Ga metals in water, dimethyl sulfoxide, and dimethylformamide, the nature
of the influence exerted by the electrode charge on the differential capacitance , which is due to reorien-
tation of solvent molecules on the electrode surface caused by specific interaction of the molecules with metals,
is analyzed. The absolute value of as a function of is shown to pass through a minimum in each solvent.
The charge that corresponds to can be adopted as a measure of the metal lyophilicity. The prefer-
ential orientation of the solvents studied at the Ga metals is determined at = 0.

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