Laser Induced Graphene Fabrication and its Application in Flexible Strain Sensors

Il San Jang

Institute of Nano Science and Technology, Kim Chaek University of Technology, Pyongyang, DPR of Korea

Abstract

In this paper, nano-patterning of graphene on polyimide films by CO₂ laser with a wavelength of 10.6μm and a power of 40W is presented. By analyzing SEM images of laser-induced graphene with different morphologies obtained at different power levels, the optimum power to obtain laser-induced graphene was obtained at 2.9 W with energy density of 29 J/cm², scanning speed of 100 mm/s and focal diameter of 0.1 mm.One method to fabricate a flexible sensor based on LIG is presented.

Keywords: laser, graphene, polyimide, flexible sensor, power