Kawamura Ayaka, Kohri Michinari, Morimoto Gen, Nannichi Yuri, Taniguchi Tatsuo, Kishikawa Keiki
Division of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan.
Yamashina Institute for Ornithology, 115 Konoyama, Abiko, Chiba 270-1145, Japan.
Sci Rep. 2016 Sep 23;6:33984. doi: 10.1038/srep33984.
The beautiful structural colors in bird feathers are some of the brightest colors in nature, and some of these colors are created by arrays of melanin granules that act as both structural colors and scattering absorbers. Inspired by the color of bird feathers, high-visibility structural colors have been created by altering four variables: size, blackness, refractive index, and arrangement of the nano-elements. To control these four variables, we developed a facile method for the preparation of biomimetic core-shell particles with melanin-like polydopamine (PDA) shell layers. The size of the core-shell particles was controlled by adjusting the core polystyrene (PSt) particles' diameter and the PDA shell thicknesses. The blackness and refractive index of the colloidal particles could be adjusted by controlling the thickness of the PDA shell. The arrangement of the particles was controlled by adjusting the surface roughness of the core-shell particles. This method enabled the production of both iridescent and non-iridescent structural colors from only one component. This simple and novel process of using core-shell particles containing PDA shell layers can be used in basic research on structural colors in nature and their practical applications.
鸟类羽毛中美丽的结构色是自然界中最鲜艳的颜色之一，其中一些颜色是由黑色素颗粒阵列产生的，这些颗粒既充当结构色又作为散射吸收体。受鸟类羽毛颜色的启发，通过改变四个变量：纳米元素的尺寸、黑度、折射率和排列，创造出了高可见性的结构色。为了控制这四个变量，我们开发了一种简便的方法来制备具有类黑色素聚多巴胺（PDA）壳层的仿生核壳颗粒。通过调节核聚苯乙烯（PSt）颗粒的直径和PDA壳层厚度来控制核壳颗粒的尺寸。通过控制PDA壳层的厚度可以调节胶体颗粒的黑度和折射率。通过调节核壳颗粒的表面粗糙度来控制颗粒的排列。这种方法仅用一种成分就能产生虹彩和非虹彩结构色。这种使用含有PDA壳层的核壳颗粒的简单而新颖的过程可用于自然界中结构色的基础研究及其实际应用。
