Study of surface wettability on fused silica by ultrafast laser-induced micro/nano-surface structures
Study of surface wettability on fused silica by ultrafast laser-induced micro/nano-surface structures
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DOI：
10.1016/j.jmapro.2022.04.035
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发表时间：
2022-05-05
影响因子：
6.2
通讯作者：
Zhao, Xin
中科院分区：
文献类型：
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作者：
Li, Kewei;Myers, Nathaniel;Zhao, Xin
汽车挡风玻璃、眼镜、护目镜、电子设备屏幕和窗户等应用迫切需要集成防雾和自清洁功能等先进功能的玻璃材料。受大自然的启发，研究人员发现多尺度表面结构是决定材料表面润湿性的关键因素。超快脉冲激光是诱导此类表面结构并随后控制不同材料上的表面功能的有前途的工具。本研究研究了飞秒激光照射熔融石英产生的不同微/纳米尺度表面结构的表面润湿性行为。研究了激光注量、重叠率和重复率对结构形貌的影响。通过操纵这些参数可以创建七种不同类型的结构：（51）微点阵列，（52）覆盖有激光诱导周期性表面结构（LIPSS）的微点阵列，（53）LIPSS，（54）覆盖有LIPSS的微槽，（55）覆盖有不规则纳米结构的微槽，（56）微通道和（57）覆盖有LIPSS的微通道。对静态接触角的研究表明，通过引入这些激光诱导的分层结构可以产生亲水和超亲水表面。建立了激光参数、表面结构、表面粗糙度和表面润湿性之间的关系。对于不同的表面结构，识别出不同的独特的平均静态接触角值。
Glass materials integrated with advanced functions, such as anti-fogging and self-cleaning functions, are urgently demanded in applications such as vehicle windshields, eyeglasses, goggles, electronic device screens, and windows. Inspired by nature, researchers have found multiscale surface structures to be a crucial factor in determining a material's surface wettability. The ultrafast pulsed laser is a promising tool to induce such surface structures and subsequently control the surface functionalities on different materials. The behavior of surface wettability with different micro/nano-scale surface structures created by femtosecond laser irradiation on fused silica is investigated in this research. The effects of laser fluence, overlapping ratio, and repetition rate on the structure morphology are studied. Seven different sorts of structures can be created by manipulating these parameters: (51) micro-dots array, (52) micro-dots array covered with laser-induced periodic surface structures (LIPSSs), (53) LIPSSs, (54) microgrooves covered with LIPSSs, (55) microgrooves covered with irregular nano-structures, (56) micro-channels and (57) micro-channels covered with LIPSSs. Investigations into the static contact angle show that hydrophilic and superhydrophilic surfaces can be generated through the introduction of these laser-induced hierarchical structures. The relationship between laser parameters, surface structures, surface roughness, and surface wettability is established. Different distinctive mean static contact angle values are identified for different surface structures.