Combined analysis of static and dynamic extinction characteristics of microbial spores and mycelia as a mid-infrared extinction material

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

“…[21] The complex refractive index m of bio-smoke materials in the 0.25-14 µm waveband can be calculated by using the spectral reflectance of materials and the Kramers-Kroning algorithm, [22][23][24][25] as mentioned in our previous work. [17,18,26] The spectral reflectance of bio-smoke material tablets in the waveband from 0.25 µm to 2.5 µm was measured by applying the U-4100 spectrophotometer (Hitachi U-4100, Hitachi Ltd., Tokyo, Japan) for UV, visible (Vis) light, and near infrared (NIR). And the spectral reflectance in 2.5 µm to 14 µm was measured by a Fourier infrared spectrometer (MAGNA-IR 750, Nicolet Instrument Co., USA) with a matched microscope (Continuµm, Nicolet Instrument Co., USA), as shown in Figs.…”

“…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.…”