Fig. 2

Flexible nanocomposite-based generator made of BaTiO₃ NPs and graphitic carbons. a Schematic illustration showing the fabrication process of an NCG device by simple, low-cost, and scalable spin-casting. b A cross-sectional SEM image of an NCG device. c The magnified photograph of piezoelectric nanocomposite. d The fabricated NCG device composed of p-NC and electrode-coated plastic substrates. e Schematics showing power generation mechanism of the NCG device. f Simulation model of an NCG device consisted of six BaTiO₃ NPs inside PDMS matrix and the calculated piezoelectric potential inside the p-NC method (reproduced from ref. [23] with permission, Wiley–VCH)