Graphene is a very promising material for real applications due to its unique properties and special structure. The methods of graphene preparation include mechanical exfoliation, silicon carbide epitaxy, chemical vapor deposition, redox and laser-induced graphene (LIG). Among them, LIG is a very promising graphene preparation method due to its advantages such as low fabrication cost, simple fabrication and low environmental pollution.
Some researchers have conducted basic studies of LIG applications including hydrogen-generating electrodes, supercapacitors and various sensors. To date, however, no research has been published on the optimal parameter selection and the influence of these parameters on the properties of LIG.
Jang Il San, a researcher at the Institute of Nano Science and Technology, has investigated the effect of laser power and scanning speed on LIG formation when CO2 laser is irradiated on polyimide films.
First, he developed a theoretical model to get temperature field distribution on the film when CO2 laser is irradiated on a polyimide film. Then, he calculated the temperature distribution inside the laser beam focus spot at different laser powers and scanning rates using COMSOL Multiphysics. After that, he determined the laser power and scanning speed range for LIG formation, and prepared graphene samples accordingly.
The simulation of the temperature field on the polyimide film during LIG fabrication showed that the temperature at which graphene is formed is above 2 800K at the depth of about 0.025mm.
If further information is needed, you can refer to his paper “Effect of Laser Power and Scanning Speed on Properties of Laser-Induced Graphene” in “Proceedings of KUTIC-2025”.