Fabrication of nanostructure and deposition of metal particles by femtosecond laser ablation in electrolyte
Fabrication of nanostructure and deposition of metal particles by femtosecond laser ablation in electrolyte
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DOI：
10.1016/j.procir.2022.09.197
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
S. Kodama;Reo Yabuuchi;G. Miyaji;W. Natsu
中科院分区：
文献类型：
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作者：
S. Kodama;Reo Yabuuchi;G. Miyaji;W. Natsu
精细结构改变了材料表面的摩擦学、光反射特性、润湿性和生物相容性等表面特性，并且通过超短脉冲激光制造的LIPSS（激光诱导周期性表面结构）由于精细结构的产生而引起关注。利用飞秒激光或皮秒激光照射材料表面，可以自组织地制备出纳米尺度的精细周期结构。然而，由于激光照射通常在具有接近加工阈值的低能量的气氛中进行，因此除了产生纳米结构之外，难以对表面进行改性。另一方面，作为局部且有效地沉积金属的电镀方法，已经报道了具有长脉冲持续时间的用于热处理的激光能够通过在用于电镀的电解液中照射基板表面来进行表面改性。因此，已经提出了在电解质中的超短脉冲激光烧蚀，以提高加工效率，澄清在金属溶液中通过激光烧蚀的金属沉积现象，以及通过实现除了纳米结构的制造之外的表面组成的控制来产生更高附加值的表面。在这项研究中，纳米结构的制造和铜颗粒的沉积进行了研究，通过飞秒激光照射在硫酸铜溶液中的基板表面上。飞秒激光在电解液中烧蚀制备了纳米结构和沉淀的金属颗粒。此外，还阐述了注量和脉冲对金属粒子沉积的影响。本研究证明飞秒激光在电解质中制备纳米结构和在辐照表面上存款金属颗粒的有效性。
Fine structures alter surface characteristics such as tribology, light reflection characteristics, wettability and biocompatibility on the surface of materials, and LIPSS (Laser-induced periodic surface structure) fabricated by an ultrashort-pulsed laser has attracted attention for the creation of fine structures. It is able to fabricate fine periodic structures of nanoscale in a self-organizing manner by irradiating the material surface with a femtosecond laser or a picosecond laser. However, it is difficult to modify the surface in addition to creating a nanostructure since laser irradiation is generally performed in the atmosphere with low energy near the processing threshold. On the other hand, as a plating method that deposits metal locally and efficiently, it has been reported that the laser with the long pulse duration for heat processing enables surface modification by irradiating the substrate surface in electrolytes for plating. Therefore, ultrashort-pulsed laser ablation in the electrolyte has been proposed to improve processing efficiency, to clarify the phenomenon of metal deposition by laser ablation in metal solutions and to create a higher value-added surface by realizing control of the surface composition in addition to the fabrication of a nanostructure. In this study, both the fabrication of a nanostructure and the deposition of copper particles were investigated by femtosecond laser irradiation on the substrate surface in a copper sulfate solution. Femtosecond laser ablation in electrolyte fabricated a nanostructure and precipitated metal particles. Moreover, the effects of fluence and pulses on the deposition of metal particles were stated. This study demonstrated the efficacy of femtosecond laser in the electrolyte to fabricate nanostructure and to deposit metal particles on the irradiated surface.