Cilia-Inspired Magnetic\nFlexible Shear Force Sensors\nfor Tactile and Fluid Monitoring

Recently, there has been a burgeoning interest in flexible\nshear\nforce sensors capable of precisely detecting both magnitude and direction.\nDespite considerable efforts, the challenge of achieving accurate\ndirection recognition persists, primarily due to the inherent structural\ncharacteristics and sensing mechanisms. Here, we present a shear force\nsensor constructed by a magnetically induced assembled Ni/PDMS composite\nmembrane, which is magnetized and integrated with a three-axis Hall\nsensor, facilitating its ability to simultaneously monitor both shear\nforce magnitude (0.7–87 mN) and direction (0–360°).\nThe cilia-inspired shear force magnetic sensor (CISFMS) exhibits admirable\nattributes, including exceptional flexibility, high sensitivity (0.76\nmN<sup>–1</sup>), an exceedingly low detection limit (1°\nand 0.7 mN), and remarkable durability (over 10,000 bending cycles).\nFurther, our results demonstrate the capacity of the CISFMS in detecting\ntactile properties, fluid velocity, and direction, offering substantial\npotential for future developments in wearable electronics.