Fabrication of a Flexible Temperature-Pressure Dual Sensor Array for E-Skin Applications

Mimicking the sensory capabilities of human skin has long been a challenge in the development of intelligent electronic systems. This study introduces a high-performance paper-based electronic skin (e-skin) capable of detecting pressure and temperature simultaneously from the same pixel. The eskin fabricated herein is utilizes paper as a substrate along with velostat thin film and NTC thermistors that enable real-time monitoring of mechanical and thermal stimuli. Both pressure and temperature sensing mechanisms rely on changes in resistance under applied stimulus. The readout is done using an integrated crossbar architecture for both the sensors simultaneously. The lightweight and flexible nature of the paper-based platform makes it suitable for applications in soft robotics and wearable health monitoring. The experimental results demonstrate high sensitivity, stability and rapid response to external stimuli. This work paves the way for the development of multifunctional, large area, low-cost, and sustainable e-skin solutions for nextgeneration flexible electronics and robotics applications.