Formation mechanism of hierarchical Micro- and nanostructures on copper induced by low-cost nanosecond lasers
Formation mechanism of hierarchical Micro- and nanostructures on copper induced by low-cost nanosecond lasers
复制标题
低成本纳秒激光诱导铜上分级微纳米结构的形成机制
DOI：
10.1016/j.apsusc.2018.09.055
复制
发表时间：
2019-01-15
影响因子：
6.7
通讯作者：
Xie, Xiaozhu
中科院分区：
文献类型：
--
作者：
Long, Jiangyou;Cao, Zuo;Xie, Xiaozhu
分级表面微纳米结构由于其在许多应用中的重要作用，近年来引起了人们的广泛关注。在众多的技术中，超快激光表面织构技术由于其灵活性和可控性，近年来在广泛的金属表面上制备大面积分级微和纳米结构方面取得了巨大的成功。然而，最近的研究表明，低成本的纳秒（ns）激光器也是可靠的工具，以诱导金属上的分层微米和纳米结构的形成，但潜在的形成机制尚未了解。在这项研究中，通过观察表面结构的形态演变，我们提出了表面层次的微和纳米结构的形成起源于激光诱导的再固化材料的积累和激光诱导羽的再沉积。一方面，我们提出的机制解释了激光脉冲宽度对表面结构形态的影响，另一方面，它解释了在其他研究中观察到的一些现象，这可能有利于该技术在不同领域的潜在应用。
Hierarchical surface micro- and nanostructures have attracted much attention in recent years due to their important roles in many applications. Among numerous techniques, ultrafast laser surface texturing technology has gained great success in recent years due to its flexibility and controllability in preparing large-area hierarchical micro- and nanostructures on a wide range of metal surfaces. However, recent studies have demonstrated that low-cost nanosecond (ns) lasers are also reliable tools to induce hierarchical micro- and nanostructures formation on metals, but the underlying formation mechanism is not yet understood. In this study, by observing the morphology evolution of surface structures, we proposed that the formation of surface hierarchical micro- and nanostructures originates from the accumulation of laser-induced resolidified materials and the redeposition of laser-induced plume. On one hand, our proposed mechanism explains the effect of laser pulse width on the morphology of surface structures, and, on the other hand, it explains some phenomena observed in other studies, which can benefit potential applications of this technology in different areas.