Department of Chemistry, Chungnam National University, Daejeon, 34134, Republic of Korea.
Faculty of Biotechnology, Chemistry and Environmental Engineering, Phenikaa University, Hanoi, 10000, Vietnam.
Small. 2022 Apr;18(17):e2200317. doi: 10.1002/smll.202200317. Epub 2022 Mar 28.
There are usually trade-offs between maximizing the color saturation and brightness and minimizing the angle-dependent effect in structural colors. Here, a magnetic field-induced assembly for the rapid formation of scalable, uniform amorphous photonic arrays (APAs) featuring unique structural colors is demonstrated. The magnetic field plays a fundamental role in photonic film formation, making this assembly technology versatile for developing structural color patterns on arbitrary substrates. The synergistic combination of surface plasmonic resonance of the Ag core and broadband light absorption of high refractive index (RI) Fe O shell in hybrid magnetoplasmonic nanoparticles (MagPlas NPs) enables breaking the trade-offs to produce brilliant, noniridescent structural colors with high tunability and responsiveness. These features enable the fabrication of various types of highly sensitive and reliable colorimetric sensors for naked-eye detection without sophisticated instruments. Furthermore, large-scale structural color patterns are effortlessly achieved, demonstrating the high potential of the present approach for full-spectrum displays, active coatings, and rewritable papers.
在最大化颜色饱和度和亮度以及最小化结构色的角度依赖性效应之间通常存在权衡。在这里，展示了一种磁场诱导组装方法，用于快速形成具有独特结构色的可扩展、均匀的非晶态光子阵列 (APA)。磁场在光子膜形成中起着根本性的作用，使得这种组装技术在任意基底上开发结构色图案具有多功能性。Ag 核的表面等离子体共振和高折射率 (RI) Fe O 壳的宽带光吸收在混合磁等离子体纳米粒子 (MagPlas NPs)中的协同组合，打破了权衡，产生了具有高可调性和响应性的鲜艳、无虹彩的结构色。这些特性使得能够制造各种类型的高灵敏度和可靠的比色传感器，用于无需复杂仪器的肉眼检测。此外，还轻松地实现了大规模结构色图案，展示了本方法在全光谱显示、主动涂层和可重写纸张方面的巨大潜力。
