Filiform Papillae-Inspired Wearable Pressure Sensor with High Sensitivity and Wide Detection Range

Flexible pressure sensor (FPS) has promising applications in fields like health monitoring and human–machine interactions. The achieving of both high sensitivity and wide detection range in FPS remains highly challenging. Here, inspired by the filiform papillae on cat tongue, a FPS (noted as FPS p ) with a sensitivity up to 504.5 kPa −1 , a detection range from 30 Pa to 350 kPa, a fast response time of 83 ms, and a high stability over 8000 cycles is developed. The papilla-like structure continuously shifts the location of stress concentration under increasing pressure, which avoids the accumulation of stress at papillae tips, resulting in a high sensitivity and wide detection range. Moreover, FPS p demonstrates capabilities in monitoring human physiological signals and movement status and can serve as the human-machine interaction interface. The work not only presents a promising wearable pressure sensor but also establishes a design strategy for high-performance wearable bioelectronics.