结构着色
材料科学
复合数
表面张力
胶体晶体
单层
自组装
制作
纳米技术
粒子(生态学)
马朗戈尼效应
纳米颗粒
胶体
张力(地质)
化学工程
复合材料
光电子学
光子晶体
压缩(物理)
医学
海洋学
物理
替代医学
量子力学
病理
地质学
工程类
作者
Xuan Li,Lei Chen,Wei Ding,Chaolang Chen,Zhaoxin Li,Jiadao Wang
标识
DOI:10.1016/j.cej.2021.130658
摘要
Liquid-air interface self-assembly (such as the classic L-B method) is the most popular way to form high-quality colloidal crystal monolayers, yet still limited by sophisticated equipment, time-consuming processes and small preparation area. Here, a tension gradient-driven nanoparticle self-assembly method is proposed to realize the high-efficiency and low-cost fabrication of large-area (25 × 18 cm2) colloidal crystal film. The periodic nanoparticle structures composed of various particles with different materials and diameters can be easily obtained in a short time and transferred to various substrates under this self-assembly method. And the preparation area is one to two orders of magnitude higher than the conventional self-assembly method. The simulation results align well with experiments, indicating that the Marangoni effect induced by tension gradient is the main driving force for self-assembly. The influence of various self-assembly parameters is investigated. Inspired by amber, a periodic particle/PDMS/nano-silica particles composite film is further designed to form a large-area durable structural color display. The structural color of the composite film is surprisingly different from that of the periodic particle which was mainly due to the unique semi-coated structure. The composite film has outstanding superhydrophobic and self-cleaning performance with a broad impact on durable structural color displays/sensors, anti-counterfeiting and other aspects.
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