Laser-Processed Stretchable-Gradient Interconnection-Based Temperature Sensor for a Real-Time Monitoring System

Wearable epidermal sensor systems have gained tremendous attraction for real-time healthcare monitoring devices with different sensor geometry and device architectures. In this work, a stretchable-gradient interconnection is introduced to a nature-inspired kirigami–serpentine-based temperature sensor with an integration of a flexible printed circuit board to obtain real-time monitoring of body temperature with high accuracy and sustainability under complex mechanical conditions. The electrical and mechanical measurements with multiple testing processes are performed, and the results show a linear response at different temperature scales and highly robust properties over multiple strain tests. A three-layer wearable patch is designed to establish a conformable bonding to the human skin and obtain wireless real-time monitoring of body temperature, thus establishing a new approach toward real-time monitoring systems with high accuracy and stability over complex environments in the field of wearable electronics.