Monolayer Colloidal Crystals by Modified Air-Water Interface Self-Assembly Approach

作者：Xin Ye, Jin Huang, Yong Zeng, Laixi Sun, Feng Geng, Hongjie Liu, Fengrui Wang, Xiaodong Jiang, Weidong Wu, Wanguo Zheng · 发表于：Nanomaterials · 年份：2017 · DOI：10.3390/nano7100291 · 被引用次数：44 · 研究领域：Electrowetting and Microfluidic Technologies、Photonic Crystals and Applications、Pickering emulsions and particle stabilization

Hexagonally ordered arrays of polystyrene (PS) microspheres were prepared by a modified air-water self-assembly method. A detailed analysis of the air-water interface self-assembly process was conducted. Several parameters affect the quality of the monolayer colloidal crystals, i.e., the colloidal microsphere concentration on the latex, the surfactant concentration, the polystyrene microsphere diameter, the microsphere polydispersity, and the degree of sphericity of polystyrene microspheres. An abrupt change in surface tension was used to improve the quality of the monolayer colloidal crystal. Three typical microstructures, i.e., a cone, a pillar, and a binary structure were prepared by reactive-ion etching using a high-quality colloidal crystal mask. This study provides insight into the production of microsphere templates with flexible structures for large-area patterned materials.