Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan, 430074, China.
Zhejiang Institute, China University of Geosciences, Hangzhou, 311305, China.
Small. 2021 Mar;17(12):e2006723. doi: 10.1002/smll.202006723. Epub 2021 Mar 3.
The diversity by nano/microstructural material or device constructing can provide the exciting opportunity for sensitivity and selectivity to achieve facile and efficient multianalyte recognition for clinical diagnosis, environment monitoring, etc., in complex system analysis. Colloidal poly(styrene-methyl methacrylate-acrylic acid) (poly(St-MMA-AA)) nanoparticle-assembled photonic crystals (PCs) can achieve manipulative 3D structural colors and approach PC sensor chip for high-efficient multianalysis utilizing simple dye. Focusing on the morphology effects of structural color, a PC microchip is designed and constructed with various geometrical micromorphologies. Based on the angle dependence of colloidal-crystal structural color, the stopband distribution is explored on various morphological PC pixels. Selective fluorescent enhancement is realized for stopband-matched PCs, which approach the successful discrimination of metal ions and complex multianalysis of groundwater. Meanwhile, printed droplet-shaping manipulation can achieve a large-scale structural-color sensor array of chips with designable nano/microstructures via colloidal assembly. It will be the critical puzzle piece between macromorphology and microstructure for the structural-color researches.
纳米/微结构材料或器件的多样性可以为灵敏度和选择性提供令人兴奋的机会，从而实现临床诊断、环境监测等复杂系统分析中简便高效的多分析物识别。胶体聚（苯乙烯-甲基丙烯酸甲酯-丙烯酸）（poly(St-MMA-AA)）纳米颗粒组装光子晶体（PCs）可以实现可操纵的 3D 结构色，并利用简单的染料接近 PC 传感器芯片，实现高效的多分析。本文聚焦于结构色的形态效应，设计并构建了具有各种几何微形态的 PC 微芯片。基于胶体晶体结构色的角度依赖性，研究了各种形态 PC 像素的阻带分布。对与阻带匹配的 PCs 实现了选择性荧光增强，成功实现了对金属离子的区分和对地下水的复杂多分析。同时，通过胶体组装，可以对印刷的液滴形状进行操作，在具有设计纳米/微结构的芯片上实现大规模结构色传感器阵列。这将是结构色研究中宏观形态和微观结构之间的关键难题。
