A stretchable, biocompatible, and self-powered hydrogel multichannel wireless sensor system based on piezoelectric barium titanate nanoparticles for health monitoring

Piezoelectric hydrogel-based sensors have emerged as a promising technology for accurately monitoring various physiological signals of the human body without the need for an external power source . The multichannel wireless sensing systems with high data acquisition efficiency and low maintenance cost markedly broaden the application of wearable sensors . However, the challenges that these sensors face is that the low voltage output can cause the output signal to be easily covered by noise when used in a multi-signal acquisition system. Here, a stretchable, biocompatible, piezoelectric hydrogel sensor is fabricated and integrated with self-developed signal processing/transmission modules to obtain a multichannel wireless sensing system. Furthermore, the system can stably and real-time wirelessly monitor physiological signals of the human body. Overall, this work represents a significant advancement in the field of piezoelectric hydrogel-based wireless multichannel sensing systems and has the potential to be applied in a wide range of complex scenarios.