HIGHLY SENSITIVE AND RELIABLE STRAIN SENSOR BASED ON MOS2-DECORATED LASER-SCRIBED GRAPHENE FOR WEARABLE ELECTRONICS

We propose a strategy for the fabrication of a highly sensitive and reliable strain sensor based on MoS2-decorated laser-scribed graphene (MDS-LSG) for flexible and wearable electronics. The laser-thinning of multilayered MoS2 coated on commercial polyimide (PI) film using a CO2 infrared laser exhibits three-dimensional hierarchical porous graphene network decorated with MoS2 enabling superior electrical properties. By exploiting the advantage of high mobility of graphene and strain-dependent property of MoS2, the technique offers a rapid route towards a simple, facile and scalable approach for the fabrication of high-performance strain sensor. As fabricated sensor endows high sensitivity (gauge factor, GF similar to 290), wide working range, fast response time and stability over 7000 cycles. Finally, we successfully apply the sensor's performance for subtle deformation of the skin (wrist pulse) and various human-motion detections.