A High‐Performance Pressure Sensor Combining the Biomimetic Structures of Shark and Crocodile Skins

摘要

Abstract Flexible pressure sensors have shown great potential in the fields of electronic skin, healthcare, and intelligent robots. However, how to balance the high sensitivity and wide working range of the sensors remains a challenge. Inspired by micrometer‐level shark ridge‐like scales and millimeter‐level crocodile skin with multi‐level dome structures, this study introduces an innovative sensor design concept cross‐scale complementary composite flexible pressure sensor combination strategy, and develops three bioinspired sensor architectures: Shark‐Shark (S‐S), Crocodile‐Crocodile (C‐C), and Crocodile‐Shark (C‐S). The S‐S design, leveraging microscale ridge‐like scaly structure, achieves exceptional sensitivity (32 kPa −1 ) in low‐pressure regimes (0–2.5 kPa), making it ideal for high‐precision applications like acoustic monitoring. The C‐C design employs millimeter‐scale domes to enable stable deformation and signal output under high pressures (≈100 kPa), excelling in scenarios such as gait analysis. The C‐S design synergistically integrates both biological structures, offering comprehensive pressure detection across a wide range (1 Pa–80 kPa) with high sensitivity (18.2 kPa −1 ), outstanding stability (20 000 cycles), and rapid dynamic response (21/28 ms response/recovery times). Its universality is demonstrated in complex applications like pulse monitoring, limb motion analysis, and adaptive robotic grasping. This performance‐balancing strategy establishes a new paradigm for optimizing the sensitivity‐range trade‐off in next‐generation flexible pressure sensors.