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

Abstract 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.