fig13

Figure 13. (A) Schematic of piezoelectric electronic devices mounted on the finger, wrist, arm and sole of feet for real-time sensing and energy harvesting; (B) Current output signals after rectification under 1.5 Hz and 64 kPa pressure. Inset: amplified diagram of current signals before and after rectification; (C) Dynamic output voltage for different hand area bends. (A-C) are reprinted with permission from Ref.^[156], Copyright © 2023 Springer Nature; (D) (top) Schematic of the seamless E-textile with inset pictures of the stretching, bending, and twisting capabilities. (bottom) Schematics for dual tactile (pressure) and tension (stretch) sensing for a taekwondo suit. Pink insets represent the pressure sensing for a knee upon striking and blue insets represent the stretch sensing for the textile on the back of the taekwondo suit when the athlete stretches forward; (E) Stress-strain curves of core-sheath yarns obtained using a tensile testing machine under an elongation speed of 500 mm·min^-1 with an initial length of 5 cm; (F) Relative capacitance response and sensitivity of the pressure sensor. (D-F) are reprinted with permission from Ref.^[60], Copyright © 2021 Elsevier; (G) Schematic diagram of the acoustoelectric device and different frame hole sizes along with the sound test setup. Reproduced with permission^[157], Copyright © 2025 American Chemical Society; (H) Schematic illustration of pseudo-streaming behavior occurred at wet/dry interface and the mechanism of current generation; (I) Real-time Voc and HEG surface temperature under 1 standard sun radiation; Infrared image of HEG under 1 standard sun radiation; (J) Schematic diagram of devices for flexible wearable electronics; Schematic diagram and picture of HEGs driven an electronic watch. (H-J) are reprinted with permission from Ref.^[158], Copyright © 2025 Elsevier. HEG: Hydroelectric generator; PLA: polylactic acid.