A self-powered triboelectric MXene-based 3D-printed wearable physiological biosignal sensing system for on-demand, wireless, and real-time health monitoring.

Sustainable, self-powered wearable devices that record physiological biosignals are essential in personalized health monitoring but have yet to be achieved. Here a novel, self-powered, MXene-based, 3D-printed, flexible, and integrated wearable system for continuous, real-time physiological biosignals monitoring is proposed, developed, characterized, and validated. The system contains power-efficient triboelectric nanogenerators (TENG), highly sensitive pressure sensors, and multifunctional circuitry. MXene, with distinctive electronegative and conductive characteristics, is the core material and is amenable to 3D-printing. MXene is coupled with a skin-like Styrene-ethylene-butylene-styrene (SEBS) substrate with a positive triboelectric property and high stretchability. This self-powered physiological sensing system exhibited a power output of ~ 816.6 mW m⁻², a sensitivity of ~ 6.03 kPa⁻¹, a low detection limit of ~ 9 Pa, and a fast response time of ~ 80 ms, enabling continuous radial artery pulse (RAP) waveform monitoring without external power. Its continuous, on-demand, fully self-powered RAP monitoring and wireless data and power transmission through near-field communication are demonstrated. This is the first report of a wearable system for continuous and real-time physiological biosignals monitoring fully powered by human motion, signaling exciting potential in the field. [Display omitted] • Reporting a novel, 3D-printed, and integrated self-powered wearable sensing system for real-time vital signs monitoring. • The system is capable of continuous, real-time, on-demand, and fully self-powered radial-artery-pulse waveform monitoring. • MXene, a 2D transition material with distinctive electronegative and conductive characteristics, is the used core material. • The system is capable of wireless and continuous power and data transmission on-demand via NFC technology. [ABSTRACT FROM AUTHOR]