Computational analysis of parameter optimization and manufacture mechanics of LIG flexible electrode

Artikel i vetenskaplig tidskrift, 2026

With increasing attention paid to wearable devices and flexible sensing technologies, flexible electronics, as an interdisciplinary field integrating materials science and micro/nano manufacturing, is rapidly entering a stage of application expansion. Laser-induced graphene (LIG) technology is considered one of the potential pathways for graphene preparation for high-performance flexible electronic devices. This study explores the temperature feature and the transformation mechanism of flexible PI films into graphene under CO2 laser irradiation from a multi-scale perspective. A solid heat transfer model was constructed based on the finite element method to dynamically simulate the temperature field distribution on the PI surface during laser scanning. The results show a highly linear positive correlation between temperature and laser energy density. Furthermore, the thermal decomposition evolution of PI in the range of 2800-3400 K was analyzed using molecular dynamics simulations based on a reactive force field. The microscopic simulation results show that the generated LIG possesses a larger specific surface area at higher temperatures, exhibiting the optimal density distribution of hexagonal carbon ring structures when the temperature reaches 3400 K.