Fig. 4From: Low-Cost and High-Productivity Three-Dimensional Nanocapacitors Based on Stand-Up ZnO Nanowires for Energy StorageTypical capacitance-voltage (C-V) characteristics of the ZnO NW-based capacitors with different thicknesses of the Al2O3 dielectric at 1 kHz. As a comparison, the C-V curve of the planar capacitor with a 5-nm Al2O3 dielectric is also illustrated. The inset shows the schematic of the electrical test structureBack to article page