CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei 230026, China.
Nanoscale. 2019 Mar 14;11(11):4803-4810. doi: 10.1039/c8nr09747j.
Artificial bioinspired surfaces are attracting increasing attention because of their fascinating characteristics, such as the structural color of a butterfly wing and the anisotropic wetting of a rice leaf. However, realization of the multicolor biomimetic metal surfaces with controlled anisotropy by using a simple, inexpensive and efficient method remains a challenge. Herein, we propose a focused laser interference lithography processing method, which has sufficient energy density and high processing efficiency to directly fabricate the groove structures on the metal surface. The surface is multicolor due to the diffraction grating effect of the regular groove structures, and exhibits anisotropic wetting due to its single-direction morphology. The influence of the observation angle on the diversity of colors and the anisotropic wetting under different heights and periods of grooves have been quantitatively investigated. A variety of patterns (e.g., leaf, crab, windmill, letter and so on) can be processed on various metals (e.g., stainless steel, Ti, Ni, Cu, Fe, Zn and so on) by this focused laser interference lithography because of its excellent flexibility and wide range of suitable materials. This multi-functional metal surface has broad applications in identification code, decorative beautification, anti-counterfeiting, information storage, bionic application design and so on.
人工仿生表面因其迷人的特性而受到越来越多的关注，例如蝴蝶翅膀的结构色和水稻叶片的各向异性润湿。然而，通过使用简单、廉价和高效的方法来实现具有可控各向异性的多色彩仿生金属表面仍然是一个挑战。在此，我们提出了一种聚焦激光干涉光刻处理方法，该方法具有足够的能量密度和高处理效率，可以直接在金属表面上制造槽结构。由于规则槽结构的衍射光栅效应，表面呈现多色，由于其单方向形态，表现出各向异性润湿。定量研究了观察角度对不同高度和周期槽的颜色多样性和各向异性润湿的影响。通过这种聚焦激光干涉光刻，可以在各种金属（例如不锈钢、Ti、Ni、Cu、Fe、Zn 等）上处理各种图案（例如，叶子、螃蟹、风车、字母等），因为它具有出色的灵活性和广泛的适用材料范围。这种多功能金属表面在识别码、装饰美化、防伪、信息存储、仿生应用设计等方面具有广泛的应用前景。
