具有加色混色性能的仿生明亮、非彩虹色结构色纳米颜料
Advanced Optical Materials
(
IF
8.0
)
Pub Date : 2024-11-13
, DOI:
10.1002/adom.202402324
Wentao Wang, Wenzhen Zhang, Yicheng Zhou, Yuyuan Yao, Bingtao Tang, Liming Ding
由于具有高化学和光稳定性的独特特性，老人护理13825404095结构着色材料在许多应用中有可能取代有机染料和颜料。结构色材料最常见的制造方法是“自下而上”的自组装方法。然而，组装的结构很容易受到外力的破坏，导致褪色甚至消失。因此，在没有组装过程的情况下制造出模仿吸收颜料外观的结构色仍然是一个挑战。受虎头松鸦的启发，创造了非彩虹色结构着色的纳米颜料，这些纳米颜料由空心 SiO2 （H-SiO2） 微球组成，壳内壁上有无定形碳，壳层上有无序超表面。结果表明，该颜色源于无序超表面和非晶碳层的协同作用，可以分别产生强相干散射光和有效吸收非相干散射光。令人惊讶的是，H-SiO2 微球即使在研磨或分散在水中后也能保持其结构颜色。此外，通过两种基色的加色混合并精确调整它们的比例，可以实现跨越可见光谱的渐变结构色。这些特征为所设计的纳米颜料带来了广阔的前景。
Bio‐Inspired Bright Non‐Iridescent Structurally Colored Nanopigments Featuring Additive Color Mixing Performance
Owing to the unique features of high chemical and photostability, structurally colored materials can potentially replace organic dyes and pigments in many applications. The most common fabrication method of structural color materials is the “bottom‐up” self‐assembly approach. However, the assembled structures are easily damaged by external forces, leading to color fading or even disappearance. Therefore, it is still a challenge to fabricate structural colors that mimic the appearance of absorbing pigments without assembly processes. Inspired by the Steller's jay, non‐iridescent structurally colored nanopigments are created, which are composed of hollow SiO2 (H‐SiO2) microspheres with amorphous carbon on the inner wall of the shell and disordered metasurfaces on the shell layer. It is shown that the color originates from the synergistic effect of the disordered metasurfaces and the amorphous carbon layer, which can produce strong coherent scattered light and effectively absorb incoherently scattered light, respectively. Amazingly, the H‐SiO2 microspheres can maintain their structural colors even after grinding or being dispersed in water. What's more, through the additive color mixing of two base colors and precise tuning of their ratios, gradient structural colors that spanning the visible spectrum can be achieved. These features indicate promising prospects for the designed nanopigments.
