Transmittance of Laser in the Microorganism Aggregated Particle Swarm

Xinying, 赵欣颖 Zhao; Yihua, 胡以华 Hu; Gu, Youlin; Le, 李乐 Li

doi:10.3788/aos201535.0616001

Cited by 9 publications

(5 citation statements)

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“…According to transmission and reflectance spectra, Wang et al [13] calculated the optical constants of seven microbial particles in the 2.5-25 µm wavelength range and measured the electromagnetic attenuation properties of microbial particles through smog chamber experiments. Professor Hu's research team [14][15][16][17][18] studied the extinction mechanism of bioaerosols and explored the potential of bioaerosol as a new smoke material through smoke box experiments.…”

Section: Introductionmentioning

confidence: 99%

Analysis of optical properties of bio-smoke materials in the 0.25–14 μm band

Zhao

et al. 2019

Chinese Phys. B

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At present, research into optical properties of bio-smoke materials mostly concentrates on single band or single germplasm. Herein, we measured the spectral reflectance of three eukaryotic bio-smoke materials and three prokaryotic bio-smoke materials in the waveband from 0.25 µm to 14 µm. Based on the Kramers-Kroning algorithm, the complex refractive index m(λ ) was calculated and the Fourier-transform infrared (FTIR) spectra of materials were analyzed. The results show that n(λ ) of bio-smoke materials varies between 1.1-2, and n(λ ) values in the visible light to near-infrared wavebands are significantly larger than those in other wavebands. The k(λ ) of bio-smoke materials varies between 0-0.4. At 6-6.5 µm, k(λ ) of prokaryotic materials is 3 times that of eukaryotic materials, which is caused by C=O stretching vibration of amide I and C-N stretching vibration of amide II in proteins. At 2.5-3 µm and 9.75 µm, k(λ ) values of eukaryotic bio-smoke materials are nearly 2 times that of prokaryotic ones. The absorption peak at 2.5-3 µm is mainly triggered by C-H stretching vibration in lipid and O-H stretching vibration in bound water. The absorption peak at 9.75 µm is mainly caused by symmetric stretching vibration of PO − 2 in nucleic acids.

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Section: Introductionmentioning

confidence: 99%

Analysis of optical properties of bio-smoke materials in the 0.25–14 μm band

Zhao

et al. 2019

Chinese Phys. B

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“…Therefore, the CRI of biological aggregation particles is not equal to that of the material itself. The effective CRI of biological aggregation particles can be calculated from the CRI of primitive material and the porosity of aggregation particles [13,14] . Porosity is a parameter that describes the degree of porosity of the internal structure of biological aggregation particles, and the larger the porosity, the looser the spatial structure of particles.…”

Section: The Cri Of Aggregation Particlesmentioning

confidence: 99%

Research progress of biological extinction materials

Chen¹,

Gu²,

Hu³

et al. 2023

Ninth Symposium on Novel Photoelectronic Detection Technology and Applications

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“…This kind of aggregated geometry enriches the size distribution of bioaerosols. To consider the aggregation of bioaerosols, we used the DDA method to calculate the extinction abilities of bioaerosols [42,50,60,61] (see Methods part). Then, the transmittance of the incident light through the bioaerosol aggregated particle swarm was obtained by Monte Carlo simulation [58,59].…”

Section: Extinction Calculation Modelmentioning

confidence: 99%

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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Transmittance of Laser in the Microorganism Aggregated Particle Swarm

Cited by 9 publications

References 0 publications

Analysis of optical properties of bio-smoke materials in the 0.25–14 μm band

Analysis of optical properties of bio-smoke materials in the 0.25–14 μm band

Research progress of biological extinction materials

Significant broadband extinction abilities of bioaerosols

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