Bioinspired Structural Color Patterns Derived from 1D Photonic Crystals with High Saturation and Brightness for Double Anti-Counterfeiting Decoration
Bioinspired Structural Color Patterns Derived from 1D Photonic Crystals with High Saturation and Brightness for Double Anti-Counterfeiting Decoration
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源于一维光子晶体的仿生结构色彩图案，具有高饱和度和亮度，可用于双重防伪装饰
DOI：
10.1021/acsapm.0c00047
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发表时间：
2020-04-01
影响因子：
5
通讯作者：
Zhang, Shufen
中科院分区：
文献类型：
--
作者：
Ma, Wei;Kou, Yusheng;Zhang, Shufen
本文提出了一种具有高色彩亮度和高饱和度的柔性、可转移的多层一维光子晶体（1D PC）图案的制备方法，用于防伪装饰。在平面衬底上交替采用自旋涂覆聚甲基丙烯酸甲酯（PMMA）纳米粒子和二氧化钛纳米粒子组装厚度小于1 μ m的pc，通过调节PMMA浓度和堆叠数来调节pc的色度和反射率。由于颗粒基PMMA层与亲水性和疏水性基材的结合力都较弱，当压敏胶在PC上施加一定的外力时，彩色薄膜可直接剥离。使用带图案的双面胶带，具有各种结构颜色图案的pc可以转移并牢固地粘接到其他柔性或弯曲的基材上。由于胶粘剂颜色较深，吸收了透射光，有效降低了后向散射，获得了非常鲜艳的结构色彩。由于PMMA材料的敏感性和纹理孔隙的存在，转移后的PC图案具有较强的角度依赖性和环境刺激响应。通过这种方法，可以用简单的pc机实现各种产品包装的双重防伪，具有更高的安全性和装饰效果。
Imitating the butterfly wing scale with a layer-bylayer structure and angle-dependent property, we present a facile method for the fabrication of flexible, transferable, and multilayered one-dimensional photonic crystal (1D PC) patterns with high color brightness and saturation for anticounterfeiting decoration. The PCs with a thickness less than 1 mu m are assembled by alternate spin-coating poly(methyl methacrylate) (PMMA) nanoparticles and titania ones on plane substrates, and their color shade and reflectivity are adjusted by modulating PMMA concentration and stack number, respectively. As the particle-based PMMA layer shows weak binding force with both hydrophilic and hydrophobic substrates, when a certain external force from pressure-sensitive adhesive is exerted on the PC, the thin colorful film can be directly peeled off. With a patterned double-sided adhesive tape, the PCs with various structural color patterns can be transferred and strongly bonded to other flexible or curved substrates. Owing to the dark color of the adhesive, transmitted light is absorbed, and backscattering is effectively lowered to obtain very brilliant structural colors. The transferred PC patterns with beautiful colors show strong angle dependence and environmental stimulus responses because of the sensitive PMMA material and textural pores existing in the PCs. With this method, double anticounterfeiting with higher security and decorative effect is achieved with simple PCs for various product packages.