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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 7 — Apr. 7, 2014
  • pp: 7925–7930

Calculation and experimental validation of spectral properties of microsize grains surrounded by nanoparticles

Haitong Yu, Dong Liu, Yuanyuan Duan, and Xiaodong Wang  »View Author Affiliations

Optics Express, Vol. 22, Issue 7, pp. 7925-7930 (2014)

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Opacified aerogels are particulate thermal insulating materials in which micrometric opacifier mineral grains are surrounded by silica aerogel nanoparticles. A geometric model was developed to characterize the spectral properties of such microsize grains surrounded by much smaller particles. The model represents the material’s microstructure with the spherical opacifier’s spectral properties calculated using the multi-sphere T-matrix (MSTM) algorithm. The results are validated by comparing the measured reflectance of an opacified aerogel slab against the value predicted using the discrete ordinate method (DOM) based on calculated optical properties. The results suggest that the large particles embedded in the nanoparticle matrices show different scattering and absorption properties from the single scattering condition and that the MSTM and DOM algorithms are both useful for calculating the spectral and radiative properties of this particulate system.

© 2014 Optical Society of America

OCIS Codes
(030.5620) Coherence and statistical optics : Radiative transfer
(160.6060) Materials : Solgel
(290.4210) Scattering : Multiple scattering

ToC Category:

Original Manuscript: February 12, 2014
Manuscript Accepted: March 18, 2014
Published: March 27, 2014

Virtual Issues
Vol. 9, Iss. 6 Virtual Journal for Biomedical Optics

Haitong Yu, Dong Liu, Yuanyuan Duan, and Xiaodong Wang, "Calculation and experimental validation of spectral properties of microsize grains surrounded by nanoparticles," Opt. Express 22, 7925-7930 (2014)

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