Figure 4From: Three-dimensional AlZnO/Al2O3/AlZnO nanocapacitor arrays on Si substrate for energy storageCharge-discharge curves and charging process of the capacitor. (a) The charge-discharge curves of the fabricated capacitor with an electrode radius of 400 μm, and the inset shows the equivalent resistor-capacitor circuit. (b) The charging process of the capacitor under different voltage supplies such as 1, 0.6, and 0.2 V.Back to article page