Figure 9.

(a) Digital photographs of the stretchable elastic-composite generator (SEG) stitched on a nylon stocking. Photograph of the SEG intentionally stretched and fitted over a human thigh; (b) Stretching on human knees and the generated voltage and current from the SEG on the stocking by bending and straightening the knee; (c) Schematic diagram illustrating the detailed fabrication process of a fiber-based generator (above) and woven fabric FBG sewed on a lab coat (below); (d) The voltage charging curve of the 2.2 μF commercial capacitor by the “power shirt” and typical bridge rectifier circuit for transforming alternating current to direct current; (e) SEM image (above) and digital photography (below) of the polyester fabric after PEDOT:PSS coating; (f) Experimental results of output voltage and power as a function of current for the fabricated devices. Current–power curves are parabolic for all devices. Reproduced from [162,163,168] with permissions by John Wiley & Sons, Copyright 2015 and by ACS Publications, Copyright 2014 and by Nature Publishing Group, Copyright 2014.