Zhou Yating, You Xianzhu, Liu Wenying, Yang Wei, Jin Xuru, Pei Xiaopeng, Xiang Sheng, Zhou Hua, Liao Zhiyong, Tan Ying
College of Life and Environmental Science, Wenzhou University, Wenzhou, 325035, China.
Department of Respiratory and Critical Care Medicine, The Quzhou Affiliated Hospital of Wenzhou Medical University, Quzhou People's Hospital, Quzhou, 324000, China.
Small. 2024 Nov;20(44):e2401063. doi: 10.1002/smll.202401063. Epub 2024 Jul 11.
Structural colors generated via total internal reflection (TIR) using nanostructure-free micro-concave shapes have garnered increasing attention. However, the application of large micro-concave structures for structural coloration remains limited. Herein, a flexibly tunable structural color film fabricated by casting polydimethylsiloxane (PDMS) on an array of large poly(glycidyl methacrylate) (PGMA) bowl-shaped particles is reported. The resultant film exhibits tunable red to green structural colors with changing observation angles. Moreover, the color can be further tailored by altering the shape of the film itself. The incorporation of the PDMS layer not only facilitates a shift in the locus of TIR from the bottom surface to the top concave surface of the particles, thereby enabling the generation of structural color, but also confers enhanced flexibility to the film. Further decoration with silver nanoparticles imparts antimicrobial properties, yielding a novel antimicrobial coating material with structural colors. The simple and cost-effective strategy for the production of structural color films provides potential applications in antimicrobial coatings, enabling accessible and customizable structural coloration using big-size micro-concave particles.
通过使用无纳米结构的微凹形状经由全内反射（TIR）产生的结构色已受到越来越多的关注。然而，大型微凹结构在结构着色方面的应用仍然有限。在此，报道了一种通过将聚二甲基硅氧烷（PDMS）浇铸在大型聚（甲基丙烯酸缩水甘油酯）（PGMA）碗状颗粒阵列上制备的可灵活调谐的结构色薄膜。所得薄膜在改变观察角度时呈现出从红色到绿色的可调结构色。此外，颜色可以通过改变薄膜本身的形状进一步调整。PDMS层的引入不仅有助于全内反射的轨迹从颗粒的底面转移到顶面凹面，从而实现结构色的产生，而且还赋予薄膜增强的柔韧性。用银纳米颗粒进一步装饰赋予抗菌性能，产生一种具有结构色的新型抗菌涂层材料。这种生产结构色薄膜的简单且经济高效的策略在抗菌涂层方面具有潜在应用，能够使用大尺寸微凹颗粒实现可及且可定制的结构着色。
