Dong, ChaoqunLeber, AndreasDas Gupta, TapajyotiChandran, RajasundarVolpi, MarcoQu, YunpengNguyen-Dang, TungBartolomei, NicolaYan, WeiSorin, Fabien2020-08-102020-08-102020-08-102020-07-1510.1038/s41467-020-17345-8https://infoscience.epfl.ch/handle/20.500.14299/170752Fibers that harvest mechanical energy via the triboelectric effect are excellent candidates aspower sources for wearable electronics and functional textiles. Thus far however, their fab-rication remains complex, and exhibited performances are below the state-of-the-art of 2Dplanar configurations, making them impractical. Here, we demonstrate the scalable fabrica-tion of micro-structured stretchable triboelectricfibers with efficiencies on par with planarsystems. We use the thermal drawing process to fabricate advanced elastomerfibers thatcombine a micro-textured surface with the integration of several liquid metal electrodes. Suchfibers exhibit high electrical outputs regardless of repeated large deformations, and cansustain strains up to 560%. They can also be woven into deformable machine-washabletextiles with high electrical outputs up to 490 V, 175 nC. In addition to energy harvesting, wedemonstrate self-powered breathing monitoring and gesture sensing capabilities, making thistriboelectricfiber platform an exciting avenue for multi-functional wearable systems andsmart textiles.text::journal::journal article::research article