材料科学
发光
光电子学
微观结构
光子学
纳米技术
制作
遮罩(插图)
光子晶体
结构着色
荧光
光学
复合材料
物理
艺术
病理
视觉艺术
医学
替代医学
作者
Yingjuan Fu,Qikuan Cheng,Jun Zheng,Yuan Yuan,Zhiyun Lu,Dong Wang,Weihao Cai,Shuang Sun,Huamin Zhou,Yun-Ming Wang
标识
DOI:10.1021/acsami.3c13742
摘要
Counterfeit items are growing worldwide, affecting the global economy and human health. Anticounterfeiting tags based on a physical microstructure or chemical materials have enjoyed long-term commercial success due to their visualization and inexpensive production. However, conventional anticounterfeiting tags can be readily imitated. Herein, we have overcome this limitation by assembling colloidal nanospheres and two luminescent micromaterials into a composited photonic crystal (PhC) and achieved massive scale-up fabrication of multilevel anticounterfeiting PhC films in just several minutes of thermal rolling. The fabricated PhC film exhibits three optical states, including angle-dependent structural color (reflectivity = 66%) under white light, emits green light under 980 nm light, and emits red light under ultraviolet light. Multilevel anticounterfeiting colorful images were obtained by further use of masking templates, which integrate colors from both physically colored microstructures and chemical luminescent materials. Besides, the thermal-rolling process also shows excellent feasibility for assembling microunits with different sizes into high-quality functional PhC films.
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