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.