Compressive Space Dynamics Manipulation Enabling Wearable Fiber Sensors for Highly Sensitive Human Micromotion Monitoring

Wearable electronic devices have received much attention for their potential applications in soft robotics, human-machine interaction, and human motion detection. Herein, a high-performance wearable fiber sensor is constructed for monitoring human micromotion by enabling compressive space dynamics manipulation. The developed sensor depends on the porous microstructure of vanadium pentoxide@ reduced graphene oxide fiber and endows it high sensitivity in sensing. Importantly, the sensor still presents a similar porous structure compared with the initial state even after thousands of repeated bending-releasing cycles, ensuring a long-term stability. Furthermore, the synergistic effect of multiple fibers can broaden the detection range and further improve the sensitivity. Consequently, the assembled multi-fiber sensor exhibits a high sensitivity (a gauge factor value of 245.1) and an excellent stability (4000 cycles). Finally, these sensors are successfully applied to monitor small-scale human movements, showing tremendous potential as wearable electronics.