Graphenized Papertronic Devices using Blue Laser ablated Polyimide Resin Paper

Herein, a new method for fabricating graphenized material on paper coated with a microfilm thick polyimide (PI) resin for multifunctional applications is presented. Rather than using a traditional infrared CO2 laser, an inexpensive, low-power 450 nm blue light laser was used to create highly conductive graphenized paper within minutes. The PI resin was coated on Whatman grade 1 paper prior laser ablation. The resulting Laser-Induced Graphene (LIG) material was thoroughly characterized and electrical conductivity of >2000 S/m was measured. As a proof of concept for wearable electronic applications, the generated versatile graphenized conductive substrate was harnessed for strain sensing application.