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1.合肥工业大学 光电技术研究院 仪器科学与光电工程学院 特种显示技术国家工程实验室 测量理论与精密仪器安徽省重点实验室, 安徽 合肥 230009
2.中国电子科技集团 第13研究所, 河北 石家庄 050051
Received:16 May 2022,
Revised:23 May 2022,
Published:05 September 2022
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ZHU Qing, LIU Gen, GOU Han-guang, et al. Reduced harmful blue light attenuator based on self-assembly of metal nanoparticles[J]. Chinese journal of liquid crystals and displays, 2022, 37(9): 1158-1164.
ZHU Qing, LIU Gen, GOU Han-guang, et al. Reduced harmful blue light attenuator based on self-assembly of metal nanoparticles[J]. Chinese journal of liquid crystals and displays, 2022, 37(9): 1158-1164. DOI: 10.37188/CJLCD.2022-0168.
为了减少LED等照明方式中有害蓝光成分对人眼带来的危害,提出了一种基于金属纳米颗粒自组装的局域表面等离子体共振效应的减有害蓝光衰减器。通过合成制备了银包金纳米颗粒(Au@Ag NPs)和银纳米颗粒(Ag NPs),使用自组装的方法在石英玻璃上制备了纳米颗粒单层膜,并通过退火进行后处理改变颗粒形貌和分布。使用扫描电子显微镜(SEM)图像对不同样品纳米颗粒的形貌以及排布方式进行分析,对样品进行紫外可见光透射光谱测试,并借助于时域有限差分法对透射情况进行模拟,分析影响透射峰值的因素。结果表明,自组装方法制备的样品对不同波段的光传输有选择性的衰减,并且在退火后衰减峰值发生了蓝移。最后,展示了不同样品在白光LED下的实际透光效果,其中退火Ag NPs样品在416 nm有害蓝光波段处,可将透射减至24.5%,有效地衰减了有害蓝光,具有优异的蓝光防护效果。
In order to reduce the harmful blue light component of LEDs and other illumination modalities to human eyes, we propose a reduced harmful blue light attenuator based on the local surface plasmon resonance effect of self-assembled metal nanoparticles. The silver-covered gold nanoparticles (Au@Ag NPs) and silver nanoparticles (Ag NPs) were prepared by synthesis. Nanoparticle monolayers film were prepared on quartz glass using the self-assembly method, and the particle morphology film and distribution were changed by post-treatment through annealing. The scanning electron microscopy (SEM) images were used to analyze the morphology of nanoparticles of different samples as well as the arrangement pattern. The samples were subjected to UV-Vis transmission spectroscopy and the transmission was simulated with the help of time-domain finite difference method to analyze the factors affecting the transmission peaks. The results show that the samples prepared by the self-assembly method have selective attenuation of light transmission at different wavelengths and the attenuation peaks are blue-shifted after annealing. Finally, this paper shows the actual light transmission effects of different samples under white LEDs, in which the annealed Ag NPs sample can reduce the transmission to 24.5% at the 416 nm harmful blue light band, which significantly and effectively attenuates the harmful blue light and has excellent blue light protection effect.
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