基于皮秒激光的石墨表面亚微结构加工方法

Processing Method of Graphite Surface Submicrostructure Based on Picosecond Laser

低反射率和超亲水性是提高电子器件性能的理想条件,石墨烯作为一种新型超导材料在电子信息领域得到了广泛的应用。目前实现低反射和超亲水性多依赖飞秒激光对石墨表面进行微结构设计和加工,较高的加工成本限制了其进一步的发展。因此,提出了一种基于皮秒激光的低成本、低反射率石墨表面微结构制备方法。通过实验系统地研究了激光加工参数对石墨表面微观形貌及其反射率和亲水性的影响。结果表明,经激光加工后,具有微结构表面的石墨样品反射率明显降低。此外还实现了样品接触角的有效调控,同时验证了加工后石墨样品表面氧化石墨烯的生成。利用紫外皮秒激光器在石墨表面制备微结构的方法具有高效可控、低成本等优点,为制备表面功能组件方面的潜在应用提供了技术支撑。

Low reflectivity and superhydrophilicity are ideal conditions for improving the performance of electronic devices,graphene as a new superconducting material has been widely used in the field of electronic information.At present,the realization of low reflection and superhydrophilicity mostly depends on the microstructure design and processing of graphite surface by femtosecond laser,and the high processing cost limits its further development.Therefore,we propose a low-cost,low-reflectivity graphite surface microstructure processing method based on picosecond laser.The effects of laser processing parameters on the micro-morphology,reflectivity and hydrophilicity of graphite surface are systematically studied through experiments.The results show that the reflectance of graphite samples with microstructured surfaces is significantly reduced after laser processing.In addition,the contact angle of graphite samples is effectively regulated,and the generation of graphene oxide on the surface of graphite samples after processing is verified.Using ultraviolet picosecond laser prepare microstructures on the graphite surface has the advantages of high efficiency,controllability and low cost,and provides technical support for its potential application in the preparation of surface functional components.