The effects of low power density CO2 laser irradiation on graphene properties

• Published in: Applied surface science Vol. 273; pp. 502 - 506
• Main Authors: Huang, Ting, Long, Jiangyou, Zhong, Minlin, Jiang, Juan, Ye, Xiaohui, Lin, Zhe, Li, Lin
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 15.05.2013; Elsevier
• Subjects: Carbon; Carbon dioxide lasers; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Crystal structure; Density; Economics; Exact sciences and technology; Graphene; Irradiation; Laser irradiation; Lasers; Physics; Raman spectrum; Thermal annealing; XPS; XPS; Laser irradiation; Thermal annealing; Graphene; Raman spectrum; Raman spectra; Laser radiation; Physical radiation effects; Carbon dioxide lasers; X-ray photoelectron spectra
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2013.02.069

► Graphene structure was modified in a controlled manner by CO2laser irradiation. ► Thermal effect played an important role in CO2 laser irradiation on graphene. ► CO2 laser may enable high-efficiency and economical modification of graphene. We report the investigations on structural modifications in monolayer graphene induced by low-power-density CO2 laser irradiation (2–60W/cm2). Observed modifications in graphene include the disassembly of crystalline graphene into nanocrystalline structure and the generation of amorphous carbon. It was found that thermal effect played an important role during laser irradiation. By adjusting laser power density, irradiation time and temperature, the structure of graphene can be modified accordingly in a controlled manner. Our approach may enable high-efficiency and economical modification of large-area graphene, which relies on large-area irradiation using low-power-density laser.