Brilliant and Angular-Independent Photonic Balls Using High-Refractive-Index Inorganic-Polymer Hybrid Materials

IF 8 2区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Yangnan Jiang, Ayano Shirai, Michinari Kohri, Ryosuke Ohnuki, Shinya Yoshioka, Tetsuya Yamamoto, Yukikazu Takeoka
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Abstract

In the modern era, structural color materials are regarded as safe and promising alternatives to colorants that contain harmful components. However, developing structural color materials that exhibit vivid colors with minimal angular dependence is crucial for their practical application. In this study, spherical colloidal crystals (photonic balls) with bright colors and effectively suppressed angular dependence are developed using monodisperse high refractive index CeO₂ particles. To fabricate these photonic balls, CeO₂@PDA particles are synthesized by coating CeO₂ particles with polydopamine (PDA), a black component. The light-absorbing PDA coating on each particle uniformly reduces the multiple scattering of light to form a black background, allowing the CeO₂@PDA photonic balls to exhibit brilliant structural colors. Compared to SiO₂ particles photonic balls, which are widely studied in previous research, CeO₂@PDA photonic balls have a significantly reduced angular dependence of structural color hue due to their composition of materials with a higher refractive index. Additionally, the CeO₂@PDA photonic balls are heat-treated in a nitrogen atmosphere, transforming the polymer component on the particle surface into a black carbonaceous material with a higher refractive index. This process further reduces the angular dependence of structure color hues observed from the photonic balls and improves color vibrancy.

Abstract Image

利用高折射率无机-聚合物杂化材料制备的光能与角度无关的光子球
在现代,结构着色材料被认为是安全的,有前途的替代品,含有有害成分的着色剂。然而,开发具有最小角度依赖性的生动色彩的结构颜色材料对于其实际应用至关重要。本研究利用单分散高折射率的CeO₂粒子,制备了颜色鲜艳、角依赖性被有效抑制的球形胶体晶体(光子球)。为了制造光子球,在CeO₂粒子上涂上黑色成分聚多巴胺(PDA),合成了CeO₂@PDA粒子。每个粒子上的吸收光的PDA涂层均匀地减少了光的多次散射,形成了黑色的背景,使CeO₂@PDA光子球呈现出明亮的结构颜色。与以往广泛研究的SiO₂粒子光子球相比,由于其材料的折射率更高,CeO₂@PDA光子球对结构色相的角依赖性显著降低。此外,在氮气气氛中对CeO₂@PDA光子球进行热处理,将粒子表面的聚合物成分转化为具有更高折射率的黑色碳质材料。这一过程进一步降低了从光子球观察到的结构颜色的角度依赖性,提高了颜色的活力。
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来源期刊
Advanced Optical Materials
Advanced Optical Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-OPTICS
CiteScore
13.70
自引率
6.70%
发文量
883
审稿时长
1.5 months
期刊介绍: Advanced Optical Materials, part of the esteemed Advanced portfolio, is a unique materials science journal concentrating on all facets of light-matter interactions. For over a decade, it has been the preferred optical materials journal for significant discoveries in photonics, plasmonics, metamaterials, and more. The Advanced portfolio from Wiley is a collection of globally respected, high-impact journals that disseminate the best science from established and emerging researchers, aiding them in fulfilling their mission and amplifying the reach of their scientific discoveries.
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