Lai Chung-Jui, Tsai Hui-Ping, Chen Ju-Yu, Wu Mei-Xuan, Chen You-Jie, Lin Kun-Yi, Yang Hong-Ta
Department of Chemical Engineering, National Chung Hsing University, 145 Xingda Road, Taichung City 40227, Taiwan.
Department of Civil Engineering, National Chung Hsing University, 145 Xingda Road, Taichung City 40227, Taiwan.
Nanomaterials (Basel). 2022 May 29;12(11):1856. doi: 10.3390/nano12111856.
Most bio-inspired antireflective nanostructures are extremely vulnerable and suffer from complicated lithography-based fabrication procedures. To address the issues, we report a scalable and simple non-lithography-based approach to engineer robust antireflective structures, inspired by the longtail glasswing butterfly, in a single step. The resulting two-dimensional randomly arranged 80/130/180 nm silica colloids, partially embedded in a polymeric matrix, generate a gradual refractive index transition at the air/substrate interface to suppress light reflection. Importantly, the randomly arranged subwavelength silica colloids display even better antireflection performance for large incident angles than that of two-dimensional non-close-packed silica colloidal crystals. The biomimetic coating is of considerable technological importance in numerous practical applications.
大多数受生物启发的抗反射纳米结构极其脆弱，且受制于基于光刻的复杂制造工艺。为解决这些问题，我们报告了一种受长尾透翅蝶启发的、可扩展且简单的非光刻方法，能一步制造出坚固的抗反射结构。由此得到的部分嵌入聚合物基质中的二维随机排列的80/130/180纳米二氧化硅胶体，在空气/基底界面处产生渐变的折射率，以抑制光反射。重要的是，随机排列的亚波长二氧化硅胶体在大入射角下比二维非密堆积二氧化硅胶体晶体具有更好的抗反射性能。这种仿生涂层在众多实际应用中具有相当重要的技术意义。
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