Magnetic Cilia and Hair‐Follicle Architecture Enabled Dual‐Mode Bionic E‐Skin for High‐Sensitivity and Wide‐Linear‐Range Tactile/Touchless Perception

Abstract Pressure/magnetism dual‐mode sensors for tactile/touchless perception are desired to adapt multifunctional applications. However, it remains a challenge to possess high sensitivity and a wide linear response range in both modes. Here, a bionic e‐skin with magnetic cilia and hair‐follicle architecture (MCHFA) is proposed to achieve high‐sensitivity and wide‐linear‐range pressure/magnetism dual‐mode perception (0–26 kPa: S = 2.72 kPa ⁻¹ , R ² = 0.99; 26–400 kPa: S = 0.60 kPa ⁻¹ , R ² = 0.99; 10–171 mT: S = 2.8 T ⁻¹ , R ² = 0.94), where the high sensitivity is mainly dominated by the easy deformation of cilia and the wide linear range is attributed to the gradient compressibility of the synergistic architectures of the cilia and the hair‐follicle. Additionally, high resolutions of pressure (0.20%) and magnetism (11.0%) are obtained due to the wide‐linear‐range high sensitivity in both modes. These excellent characteristics in dual modes endow the MCHFA‐based sensor multifunctional applications in health monitoring and human–machine interfaces, such as a finger bending game for the rehabilitation training and the prevention of senile dementia, and a noncontact coded lock taking advantage of less risks in cross infection and personal information leakage.