Fig. 7

Energy applications by flexible and stretchable NCG devices. a The electrical energy generated from an NCG pad driven by human muscle movement (foot stepping) (reproduced from ref. [23] with permission, Wiley–VCH). b The commercial electronic devices such as LCD and LEDs operated by the harvested electricity (reproduced from ref. [26] with permission, Wiley–VCH). c The captured images showing the stimulation of a frog’s sciatic nerve by an NCG device (reproduced from ref. [36] with permission, American Chemical Society). d Photographs of the hyper-stretchable NCG stitched on a nylon stocking (reproduced from ref. [28] with permission, Wiley–VCH). e The converted electrical voltage and current from an NCG device under repeatedly stretching (reproduced from ref. [28] with permission, Wiley–VCH). f The schematic diagram of hyper-stretchable NCG attached on spring-based suspensions. The NCG device can produce power during shock absorbing of spring