Absorption and scattering of near-infrared light by dispersed lanthanum hexaboride nanoparticles for solar control filters
Absorption and scattering of near-infrared light by dispersed lanthanum hexaboride nanoparticles for solar control filters
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DOI：
10.1557/jmr.2010.0075
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发表时间：
2010-03-01
影响因子：
2.7
通讯作者：
Asahi, Tsuyoshi
中科院分区：
文献类型：
--
作者：
Adachi, Kenji;Miratsu, Mitsunobu;Asahi, Tsuyoshi
不同粒径的六硼化镧 (LaB(6)) 纳米粒子分散涂层在紫外至近红外 (NIR) 波长范围内的光学吸收和散射行为已被研究，以应用于阳光控制滤光片。当颗粒尺寸减小到纳米级时，引入了大特征近红外吸收，并根据传导电子的局域表面等离子体共振（LSPR）讨论了其起源。测量了LaB(6)的光学常数并进行了米氏散射理论分析。人们发现该理论大体上复制了光学特性，并且已经讨论了不同粒径下吸收波和散射波部分以及局域表面等离子体共振波长的变化。理论上，吸收峰的形状比实验中的更窄，并且位于更短的波长处，这表明这主要归因于 LaB(6) 纳米粒子的非球形扭曲形状。
Optical absorption and scattering behaviors of lanthanum hexaboride (LaB(6)) nanoparticulate dispersion coatings with various particle sizes have been investigated in the ultraviolet to near-infrared (NIR) wavelengths for application to solar control filters. Large characteristic near-infrared absorption is introduced as the decreased particle size falls into nanoscale, and its origin is discussed in terms of a localized surface plasmon resonance (LSPR) of conduction electrons. Optical constants of LaB(6) have been measured and Mie scattering theory analysis was conducted. The theory was found to generally replicate the optical characteristics, and variations of absorbed and scattered wave fractions as well as the LSPR wavelength have been discussed with varying particle size. The absorption peaks are found as shaped narrower and located at shorter wavelength in theory than in experiment, which is suggested as ascribed mainly to the nonspherical distorted shape of LaB(6) nanoparticles.