Irradiation of the graphite-like carbon films by ns-laser pulse

• DOI: 10.1016/j.apsusc.2012.08.042
• Publication Date: 2012-08-20T10:30:19Z
• Authors: Liutauras Marcina...; Alfonsas Grigonis; Pranas Valatkevicius; Artur Medvid
• Keywords: Carbon fibers

Abstract The effect of a nanosecond laser irradiation of graphite-like carbon (GLC) films deposited on Si substrate by the plasma jet technique was analyzed in this work. The GLC coatings were irradiated by the nanosecond Nd:YAG lasers operating at 1064 nm (infrared (IR) radiation) and 532 nm (visible (VIS) radiation), using a multi-shot regime. The laser irradiations lead to the surface ablation and partial disarrangement of the GLC coatings. The IR laser irradiation stimulates an increase in the fraction of the sp 2 carbon bonds and formation of the nano-graphite cluster. The formation of SiC and graphite nanocrystallites was observed after VIS laser radiation by 24 MW/cm 2 energy density. FTIR results demonstrated that the reflectance of the laser irradiated carbon films decreases.