AN ULTRA-HIGH SENSITIVE WEARABLE STRAIN SENSOR BASED ON POLYHEDRAL STRUCTURED N-CO3O4 COATED LASER-INDUCED GRAPHENE

We newly proposed a piezoresistive strain sensor based on polyhedral structured nanoporous cobalt oxide (N-Co3O4) nanoparticles coated laser-induced graphene (LIG) for smart wearable electronics. Exploiting the physiochemical properties of LIG and N-Co3O4, a strain sensor with outstanding sensitivity and stability were proposed and demonstrated. The fabricated sensor exhibited ultra-high sensitivity of 1177 and 39548 in low (0 to 18%) and high (18 to 23%) strain range, respectively. It also showed an ultra-low detection limit of 0.025% and excellent stability over 10,000 cycles. Finally, we have successfully exploited the sensor's performance for wearable healthcare applications such as subtle deformation (e.g., wrist pulse) induced from the human body to large finger bending motion.

Automated summary

We have proposed a piezoresistive strain sensor based on polyhedral structured nanoporous cobalt oxide coated laser-induced graphene for smart wearable electronics. The sensor exhibits outstanding sensitivity and stability, with ultra-high sensitivity and detection limit in different strain ranges. The sensor's performance has been successfully applied in wearable healthcare applications.