Wearable Electronics Powered by Triboelectrification between Hair and Cloth for Monitoring Body Motions

Diverse triboelectric nanogenerators (TENGs) have been extensively applied in self‐powered wearable electronics. The TENG‐based demonstration using the human body as a triboelectric material is rare, though wearable electronics plays a more and more pivotal role in portable intelligent medicine. Human hair, as part of the human body, can be a component of a TENG‐based wearable system. Herein, a novel body‐based TENG configuration made of human hair and polydimethylsiloxane (PDMS)‐coated carbon cloth is proposed. Due to triboelectrification between the hair and the PDMS layer, the output voltage can deliver 1.713 and 0.377 V in the vertical contact‐separation mode and sliding mode, respectively. In addition, a self‐powered application based on the hair‐based TENG for actively monitoring the motion state by comparing the amplitude and frequency of the output voltages is successfully demonstrated. This study broadens the application of body‐based TENGs and provides a promising and feasible strategy for developing smart health monitoring.