Stability enhancement of P(St-MAA) photonic crystals with structural colors by using SiO2 Sol
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摘要: 提出采用后填充方式制备兼具稳固性和良好结构色效果的复合光子晶体。通过采用胶体微球自组装法制备图案化聚(苯乙烯-甲基丙烯酸)(P(St-MAA))光子晶体生色结构,然后利用SiO2溶胶对P(St-MAA)光子晶体进行填充。优化了SiO2的填充条件,并对比了填充前后光子晶体生色结构的结构色效果和稳固性变化情况。结果表明:粒径分别为230 nm、250 nm和287 nm的P(St-MAA)胶体微球可构筑得到排列规整、结构色明亮的光子晶体,但晶体层的稳固性不佳;当SiO2浓度不超过30wt%,填充时间不超过5 min时,可制备得到结构色仍旧较明亮的SiO2-P(St-MAA)复合光子晶体;在相同的稳固性测试条件下,复合光子晶体稳固性明显提升,结构色效果不易消减,这主要归因于SiO2起到了类似“桥梁”的作用,加强了相邻P(St-MAA)胶体微球间的黏连,并增强了光子晶体层与基材间的黏性。本研究将为构筑高质量光子晶体提供新思路,有望推动光子晶体生色结构的实际应用。
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关键词:
- 结构色 /
- 光子晶体 /
- 稳固性 /
- SiO2溶胶 /
- P(St-MAA)微球
Abstract: A post-filling method was proposed to prepare composite photonic crystals with both stability and good structural color effects. The patterned Poly(styrene-methacrylic acid) (P(St-MAA)) photonic crystal color structure was prepared by adopting the colloidal microsphere self-assembly method, and then the P(St-MAA) photonic crystal was filled with SiO2 sol. The filling conditions of SiO2 were optimized, and the structural color effect and stability changes of the photonic crystal color structure before and after filling were compared. The results show that: P(St-MAA) colloidal microspheres with particle diameters of 230 nm, 258 nm and 287 nm can be constructed to obtain photonic crystals with regular arrangement and bright structure, but the stability of the crystal structure is not good; when the concentration of SiO2 does not exceed 30wt% and the filling time is less than 5 min, the SiO2-P(St-MAA) composite photonic crystal with bright structure color can be prepared; under the same stability test conditions, the stability of the composite photonic crystal is significantly improved, and the structure color effect is not easy to subtract, which is mainly due to the SiO2 acting like a “bridge”, strengthening the adhesion of adjacent P(St-MAA) colloidal microspheres, and enhancing the adhesion between the photonic crystal layer and the substrate. This research will provide new ideas for the construction of high-quality photonic crystals, and is expected to promote the practical application of photonic crystal chromogenic structures.-
Key words:
- structural color /
- photonic crystal /
- stability /
- SiO2 sol /
- P(St-MAA) microspheres
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表 1 材料编号及SiO2含量
Table 1. Material number and content of SiO2
Serial number 1 2 3 4 5 Content/wt% 10 20 30 40 50 -
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