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Absorption and scattering of near-infrared light by dispersed lanthanum hexaboride nanoparticles for solar control filters

Published online by Cambridge University Press:  31 January 2011

Kenji Adachi ,
Mitsunobu Miratsu  and
Tsuyoshi Asahi
Mitsunobu Miratsu
Affiliation:
Ichikawa Research Laboratories, Sumitomo Metal Mining Co., Ltd., Ichikawa, Chiba 270-8588, Japan
Tsuyoshi Asahi
Affiliation:
Department of Applied Physics, Osaka University, Suita, Osaka 565-0871, Japan
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Abstract

Optical absorption and scattering behaviors of lanthanum hexaboride (LaB6) 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 LaB6 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 LaB6 nanoparticles.

Keywords

AbsorptionOptical propertiesLanthanide
Type
Articles
Information
Journal of Materials Research , Volume 25 , Issue 3 , March 2010 , pp. 510 - 521
Copyright
Copyright © Materials Research Society 2010

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