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Self-assembly Property of SiO2 Photonic Crystals for Paper-based Materials Writing and Printing
Received:May 26, 2022  
DOI：10.11980/j.issn.0254-508X.2023.02.009
Key Words:SiO2  photonic crystal  self-assembly  microstructure  optical performance
Fund Project:制浆造纸科学与技术教育部重点实验室开放基金（KF202108）；省级大学生创新训练计划项目（S202210708112）；国家自然科学基金青年项目（31600476）。
Author NameAffiliationPostcode
CHI Congcong* College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
XU Xin College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
REN Chaonan College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
BAI Feifei College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
QU Panpan College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
XIAN Jiarong College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
REN Jiangxue College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
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Abstract:In this study， vertical self-assembly method and spin coating were used for the fabrication of silica-based photonic crystals. The effect of particle size distribution and high temperature heat treatment on the structural color of photonic crystals was studied. The microstructure and optical properties of double sized and sandwich-type photonic crystals were characterized. The results showed that the structural color of photonic crystals was enhanced after heat treatment， and the adhesion of photonic crystals to the substrate was strengthened. The central wavelength of the band gap gradually moved to longer wavelengths with the increase of the particle size of SiO2 microspheres. The more uniform the particle size， the brighter the color of the self-assembled structure of photonic crystals for the monodispersed SiO2 microspheres. Compared to that of double sized crystals， the self-assembly of monodispersed crystals was more orderly. The arrangement of crystals with L-S-L structure were smoother and more orderly than that with S-L-S structure. The high concentration of SiO2 microspheres ethanol dispersion was written on black paper materials， and presented bright colors and high saturation.
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