Measured results of ZnO NRA-based NG. (a) Measured output current and voltage of the ZnO NRA-based NG with the top electrodes of (i) Au film on PET and (ii) Au-coated silica sphere array on PET under 0.3 kgf of external pushing force. (b) Statistical distributions of the generated output (i) current and (ii) voltage by Gaussian fits.
Ko et al. Nanoscale Research Letters 2013 8:511 doi:10.1186/1556-276X-8-511