Meng Yao, Qiu Jinjing, Wu Suli, Ju Benzhi, Zhang Shufen, Tang Bingtao
State Key Laboratory of Fine Chemicals , Dalian University of Technology , P.O. Box 89, West Campus, 2# Linggong Rd , Dalian 116024 , China.
ACS Appl Mater Interfaces. 2018 Nov 7;10(44):38459-38465. doi: 10.1021/acsami.8b14146. Epub 2018 Oct 25.
The unique brilliant and angle-independent structural colors of morpho butterfly wings were derived from the multilayer interference, diffraction, and scattering of light with a composite structure including ordered and quasiamorphous arrays. Inspired by the biological heterostructure of ordered and quasiamorphous arrays in the wings, a bilayer inverse heterostructure (BLIHS) containing ordered array layers inverse structure (OALIS) and quasiamorphous array layers inverse structure (Q-AALIS) of polyvinylidene fluoride were successfully prepared through the template method. The BLIHS films selectively displayed iridescent structural color derived from Bragg diffraction of OALIS, whereas the color states transform to noniridescent color because of Q-AALIS just by rotating the sample. Furthermore, the patterning process could be realized by using the spray-coating method on the BILIS films as quasiamorphous array layers. By virtue of this novel photonic structure, the switch between hiding and displaying patterns could be easily realized by changing the viewing angles, and the as-prepared films exhibited inherent excellent durability, which is crucial to their potential for practical applications as anticounterfeiting materials.
大闪蝶翅膀独特的鲜艳且与角度无关的结构色源于光与包含有序和准非晶阵列的复合结构的多层干涉、衍射和散射。受翅膀中有序和准非晶阵列的生物异质结构启发，通过模板法成功制备了一种包含聚偏氟乙烯有序阵列层反结构（OALIS）和准非晶阵列层反结构（Q-AALIS）的双层反异质结构（BLIHS）。BLIHS薄膜选择性地呈现出源自OALIS布拉格衍射的彩虹色结构色，而仅通过旋转样品，由于Q-AALIS，颜色状态会转变为非彩虹色。此外，通过在作为准非晶阵列层的BILIS薄膜上使用喷涂法可以实现图案化过程。凭借这种新颖的光子结构，通过改变视角可以轻松实现隐藏图案和显示图案之间的切换，并且所制备的薄膜具有固有的优异耐久性，这对于它们作为防伪材料的实际应用潜力至关重要。
