Production of Flexible Piezoresistive Biomimetic Sensor from <scp> <i>Cyprinus Carpio</i> </scp> Scales

Abstract Piezoresistive wearable sensors are a widely studied topic today. Research into flexible wearable sensors has attracted interest as the Internet of Things continues to advance. Designing and producing these sensors using the biomimetic method that imitates structures in nature makes it possible to create much more sensitive and cost‐effective sensors. Polydimethylsiloxane (PDMS)‐based sensors, which stand out in terms of flexibility and durability, are among the main areas where smart wearable sensor technologies work. In this study, flexible piezoresistive sensors inspired by Cyprinus carpio scales were produced. For this purpose, sensor bases were first produced by transferring the symmetric patterns of carp scales onto PDMS polymer. Then, PEDOT: PSS conductive polymers were deposited on the PDMS molds with the patterns of Cyprinus carpio scales using the ultrasonic spray pyrolysis method. The sensors were created by optimizing the conductivity of PDMS molds with PEDOT: PSS and investigating their electrical characterizations under sinusoidal mechanical triggers using a tensile test system. Three‐dimensional structures with gradient symmetry in fish scales enhance sensor response and recovery times, achieving 40 and 39 ms, respectively, even at voltages below 0.05 V. © 2026 Society of Chemical Industry.