URL: https://www.researchgate.net/publication/326627762/figure/fig2/AS:652619160760322@1532607941645/a-Harvester-effectiveness-of-the-electrodes-charged-at-60-V-and-250-V-with-respect-to_Q320.jpg
URL2: https://www.researchgate.net/figure/a-Schematic-structure-of-the-electrostatic-energy-harvester-based-on-the-three-ports_fig1_326627762
