Self‐powered bio‐sensors are emerging as promising candidate due to their autonomous operation and self‐sustaining capability. Triboelectric nanogenerators (TENG) are emerging as promising candidate to replace batteries due to their high output power density, simple fabrication technique and cost effective. Herein, a single electrode mode TENG (SE‐TENG) has been fabricated which can be wearable on body for harvesting ambient bio‐mechanical motion. The active layer is made of zinc oxide (ZnO)/ polyvinylidene fluoride (PVDF) composite, in which the ZnO nanoparticles were synthesized using a hydrothermal technique. Blending the synthesized ZnO nanoparticles with PDVF and subsequent curing leads to the fabrication of ZnO/PVDF composite film. The novelty lies in integrating the ZnO/PVDF SE‐TENG has been made as a dual function platform for energy harvesting as well as self‐powered sweat sensing in a single wearable device. The electrical response of the SE‐TENG device generates a maximum electrical output response of 1.5 V and 0.8 µA, respectively upon human hand tapping. The generated electrical output was validated by powering commercial LEDs and capacitors. Further, the wearable SE‐TENG device was used for the real‐time application of wearable sweat sensing, capable of detecting sweat produced in the human body during physical activities. The obtained results prove that the fabricated self‐powered sweat sensor paves way toward future diagnosis systems and smart healthcare.
Anbalagan et al. (Wed,) studied this question.