Highly sensitive spider-slit-organ-inspired crack-based flexible temperature sensor

Abstract

We found that a spider-slit-inspired bionic structure is not only sensitive to tiny vibrations but also exhibits remarkable sensitivity to temperature changes, as confirmed through testing. Based on these findings, we propose a bionic, crack-based graphene temperature sensor, whose temperature sensitivity reaches 9.93 × 10⁻³ °C⁻¹. We studied the influence of the thickness of the PDMS substrate and the laser-scribing angle on the performance of the sensor; the optimized parameter for the thickness of the PDMS substrate is 400 μm, and the laser-scribing angle is θ = 0. Meanwhile, the proposed graphene-based temperature sensor has great clinical potential for the real-time monitoring of human body temperature, and it also can be used for water/liquid temperature-change measurements and food-storage temperature detection.