Structural Color Materials for Optical Anticounterfeiting

被引:365
作者
Hong, Wei [1 ]
Yuan, Zhongke [1 ]
Chen, Xudong [1 ]
机构
[1] Sun Yat Sen Univ, Sch Chem, Guangdong Engn Technol Res Ctr High, Key Lab Polymer Composite & Funct Mat,Minist Educ, Guangzhou 510275, Peoples R China
基金
中国国家自然科学基金;
关键词
anticounterfeiting materials; liquid crystals; photonic crystals; photonic glasses; structural colors; PHOTONIC CRYSTAL PATTERNS; CHROMATIC DISPERSION; COLLOIDAL CRYSTALS; LIQUID-CRYSTALS; INVERSE OPALS; FILMS; NANOCOMPOSITE; HYDROGELS; SENSOR; POLYMERIZATION;
D O I
10.1002/smll.201907626
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The counterfeiting of goods is growing worldwide, affecting practically any marketable item ranging from consumer goods to human health. Anticounterfeiting is essential for authentication, currency, and security. Anticounterfeiting tags based on structural color materials have enjoyed worldwide and long-term commercial success due to their inexpensive production and exceptional ease of percept. However, conventional anticounterfeiting tags of holographic gratings can be readily copied or imitated. Much progress has been made recently to overcome this limitation by employing sufficient complexity and stimuli-responsive ability into the structural color materials. Moreover, traditional processing methods of structural color tags are mainly based on photolithography and nanoimprinting, while new processing methods such as the inkless printing and additive manufacturing have been developed, enabling massive scale up fabrication of novel structural color security engineering. This review presents recent breakthroughs in structural color materials, and their applications in optical encryption and anticounterfeiting are discussed in detail. Special attention is given to the unique structures for optical anticounterfeiting techniques and their optical aspects for encryption. Finally, emerging research directions and current challenges in optical encryption technologies using structural color materials is presented.
引用
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页数:25
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