Graphene Fiber-Based Strain-Insensitive Wearable Temperature Sensor

Abstract

A strain-insensitive wearable temperature sensor based on graphene fibers is proposed to solve the temperature measurement strain interference of wearable temperature sensors. The stress, strain, and conduction characteristics of the sensor are discussed based on finite element simulations and the principle of graphene conduction. The wearable temperature sensor showed excellent negative temperature coefficient characteristics. The responsivity of the sensor is 0.85% °C−1, and the sensing resolution is 0.1 °C. The sensor shows good antiinterference below a tensile strain of 90% or a curved surface with a curvature of 0.5. When the sensor is attached to the human body, it reliably detects skin temperature changes at different curved surfaces.