激光器
紫外线
材料科学
通量
石墨烯
光热治疗
光电子学
辐照
远红外激光器
红外线的
聚酰亚胺
激光烧蚀
图层(电子)
纳米技术
光学
核物理学
物理
作者
Liyong Wang,Zhiwen Wang,Ali Naderi,Hongyu Zheng
出处
期刊:Micromachines
[Multidisciplinary Digital Publishing Institute]
日期:2020-12-11
卷期号:11 (12): 1094-1094
被引量:72
摘要
Laser-induced graphene (LIG) is an emerging technique for producing few-layer graphene or graphene-like material that has recently received increasing attention, due to its unique advantages. Subsequently, a variety of lasers and materials have been used to fabricate LIG using this technique. However, there is a lack of understanding of how different lasers (wavelengths) perform differently in the LIG conversion process. In this study, the produced LIG on polyimide (PI) under a locally water-cooled condition using a 10.6 μm CO2 infrared laser and a 355 nm ultraviolet (UV) laser are compared. The experimental investigations reveal that under the same UV and CO2 laser fluence, the ablation of PI show different results. Surface morphologies with micron-sized and nanometer pores were formed by the UV laser under different laser fluences, whereas micron-sized pores and sheet structure with fewer pores were produced by the CO2 laser. Energy dispersive spectrometry and three-dimensional topography characterization indicate that the photochemical effects were also involved in the LIG conversion with UV laser irradiation. It is also observed through experiments that the photothermal effect contributed to the formation of LIG under both lasers, and the LIG formed on PI substrates by the CO2 laser showed better quality and fewer layers.
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