Effect of Porosity on Optical Properties of Aerosol Aggregate Particles

Chaojun, 黄朝军 Huang; Zhensen, 吴振森 Wu; Yafeng, 刘亚锋 Liu; Shuming, 龙姝明 Long

doi:10.3788/aos201333.0129001

Cited by 6 publications

(1 citation statement)

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“…Non-spherical particle aggregates with different shapes have different spatial structures, radii of gyration, and porosity, resulting in different equivalent complex refractive indices [24] and extinction characteristics [12] . Adopting a spherical approximation aggregation model will result in the spatial structure differences of particle aggregates with different particle shapes being ignored, leading to an increase in the calculation error of extinction characteristics.…”

Section: Randomly Oriented Aggregation Model Of Non-spherical Particlesmentioning

confidence: 99%

Analysis of extinction characteristics of non-spherical biological particle aggregates [Invited]

Chen,

Gu,

et al. 2023

中国光学快报

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In this study, a method was presented to accurately obtain the extinction characteristics of the non-spherical biological particle aggregates. Based on the multi-sphere particle model of non-spherical particles, a randomly oriented aggregation model was firstly built to construct the aggregates. The discrete-dipole approximation method was used to calculate the extinction characteristics of aggregates in the 3-14 μm waveband. The average mass extinction coefficients of three materials are 0.802 m 2 =g, 0.907 m 2 =g, and 0.866 m 2 =g in the 3-5 μm waveband and 0.590 m 2 =g, 0.402 m 2 =g, and 0.523 m 2 =g in the 8-14 μm band, respectively. Smoke chamber experimental results are in good agreement with theoretical analyses.

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Section: Randomly Oriented Aggregation Model Of Non-spherical Particlesmentioning

confidence: 99%

Analysis of extinction characteristics of non-spherical biological particle aggregates [Invited]

Chen,

Gu,

et al. 2023

中国光学快报

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Influence of Microbial Agglomerated Particles on the Performance of Free-Space Quantum Communication

2021

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Significant broadband extinction abilities of bioaerosols

Zhao

et al. 2019

Sci. China Mater.

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Bioaerosol, an important constituent of the atmosphere, can directly affect light radiation characteristics due to absorption and scattering effects. Current research lacks a reasonable explanation for the extinction abilities of bioaerosols in a broadband. Herein, we measured the reflectance spectra of 12 common biomaterials and calculated their complex refractive indexes. The peaks of the imaginary part of the complex refractive indexes are located at wavelengths of approximately 0.7, 2.7, 6.1 and 9.5 μm. Based on photographs of the floating structures of bioaerosols, we constructed a model for calculating the extinction abilities of bioaerosols in the wavelength range of 240 nm to 14 μm. Taking AN02 spores as an example, absorption was found to account for more than 90% of the total extinction. In addition, the theoretical calculations and experimental data of transmittance corresponding to the smoke box show that bioaerosol exhibits significant broadband extinction ability from UV to IR bands, which provides new directions for the development of broadband light attenuation materials.

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Effect of Porosity on Optical Properties of Aerosol Aggregate Particles

Cited by 6 publications

References 0 publications

Analysis of extinction characteristics of non-spherical biological particle aggregates [Invited]

Analysis of extinction characteristics of non-spherical biological particle aggregates [Invited]

Influence of Microbial Agglomerated Particles on the Performance of Free-Space Quantum Communication

Significant broadband extinction abilities of bioaerosols

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