Yu Xiao-Qing, Zhu Zhijie, Wu Xingjiang, Li Ge, Cheng Rui, Qing Ren-Kun, Li Qing, Chen Su
State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials, Nanjing Tech University, No. 5 Xin Mofan Road, Nanjing 210009, P. R. China.
Nanoscale. 2020 Oct 14;12(38):19953-19962. doi: 10.1039/d0nr04676k. Epub 2020 Sep 30.
Hydrophobic photonic crystals (PCs) has been increasingly appreciated as a promising functional material due to their distinct surface characteristic of structural color and hydrophobicity. However, it remains a challenge to fabricate hydrophobic PCs via a one-step process. Inspired by the development of high-performance waterborne coatings, we propose an easy-to-perform and high-efficiency strategy to construct hydrophobic building blocks (diameter of 221, 247, 276 and 305 nm), where the umbelli-form hydrophobic long chain (veova10 C > 9) was loaded onto polystyrene (PS) colloidal particles in situ. Taking advantage of the hydrophobic driving force between the colloidal particles, large-scale colloidal photonic crystals (CPCs) film with crack-free morphology was obtained efficiently. The derived CPCs exhibit robust mechanical stability, prominent hydrophobicity and excellent optical properties. In addition, the colloidal latex holds great potential toward PCs coatings on a variety of substrates (glass, plastic and steel) with excellent adhesiveness. Furthermore, we contrive to construct angle-independent structural color films and supraballs, and explore their application in quantum dots (QDs) fluorescence enhancement, which achieved an enhancement effect by more than eight times. From the standpoint of practical applications, we achieved the flexible high-brightness wearable light-emitting diode (LED) displays. This work will lay a foundation for the development of high-efficiency PCs building blocks, and indicate the direction for the meaningful application of CPCs.
疏水性光子晶体（PCs）因其独特的结构色和疏水性表面特性，越来越被视为一种有前途的功能材料。然而，通过一步法制备疏水性PCs仍然是一个挑战。受高性能水性涂料发展的启发，我们提出了一种易于实施且高效的策略来构建疏水性构建块（直径分别为221、247、276和305 nm），其中伞形疏水性长链（veova10 C>9）原位负载在聚苯乙烯（PS）胶体颗粒上。利用胶体颗粒之间的疏水驱动力，高效地获得了具有无裂纹形态的大规模胶体光子晶体（CPCs）薄膜。所得的CPCs表现出强大的机械稳定性、显著的疏水性和优异的光学性能。此外，该胶体乳胶在各种具有优异粘附性的基材（玻璃、塑料和钢）上制备PCs涂层方面具有巨大潜力。此外，我们致力于构建角度无关的结构色薄膜和超球，并探索它们在量子点（QDs）荧光增强中的应用，实现了超过八倍的增强效果。从实际应用的角度来看，我们实现了柔性高亮度可穿戴发光二极管（LED）显示器。这项工作将为高效PCs构建块的发展奠定基础，并为CPCs的有意义应用指明方向。
