Iridescent large-area ZrO2 photonic crystals using butterfly as templates
Iridescent large-area ZrO2 photonic crystals using butterfly as templates
复制标题
DOI：
10.1063/1.3078270
复制
发表时间：
2009-02
影响因子：
4
通讯作者：
Yu Chen;Jiajun Gu;Shenmin Zhu;T. Fan;Di Zhang;Q. Guo
中科院分区：
文献类型：
--
作者：
Yu Chen;Jiajun Gu;Shenmin Zhu;T. Fan;Di Zhang;Q. Guo
以天然蝴蝶翅膀为模板，合成了尺寸较大（约3×4 cm2）的完整ZrO2（折射率为2.12）复制品。这种生物形态的 ZrO2 忠实地保留了原始蝴蝶翅膀鳞片的微观结构特征。所有复制品都能反射彩虹色的可见光，甚至可以用肉眼观察到。光学显微镜研究表明，单个鳞片反射的颜色与重叠的两个甚至更多鳞片反射的颜色不同。颜色不仅由材料的折射率、观察角度和各个单独尺度的结构决定，而且还由其堆积数量和模式决定。随着堆积鳞片数量的增加，颜色不再是简单的红移或蓝移，这是结构色最直接、最有力的证据。
Intact ZrO2 (with refractive index of 2.12) replica, which is large in size (about 3×4 cm2), has been synthesized by using natural butterfly wings as templates. Microstructure characters of original butterfly wing scales are maintained faithfully in this biomorphic ZrO2. All replicas can reflect iridescent visible lights, which can even be observed by naked eyes. Optical microscope investigations indicate that colors reflected by one single scale are different from those done by the overlapped two or even more scales. Colors are not only determined by materials’ refractive index, observation angle, and the structure of every single scale, but also by its piled number and modes. With the increase in the number of piled scales, the color is not simply redshifted or blueshifted, which is the most direct and powerful evidence for structural colors.