Figure 4

Schematic of three-electrode configuration system and CV measurements of Au-coated VSNEA. (a) Schematic of three-electrode configuration used in CV measurement system with Au-coated VSNEA as a working electrode. (b) CV measurements of Au-coated VSNEA in deionized water and 100 mM K₃Fe(CN)₆. All CV measurements are performed at a scan rate of 20 mV/s. The inset of part (b) shows an electrolyte bath attached the VSNEA device for CV measurements.