Analysis of optical properties of artificially prepared microbial spores in full optical band

Abstract

Artificially prepared microbial spores have special core-shell structure and excellent physicochemical properties, which can attenuate electromagnetic waves by the way of absorption and scattering. The application of bioaerosol in the field of light extinction has the advantages of safety and environmental protection. In this study, We selected three laboratoryprepared microbial spores and the reflectance spectra of the microbial spore compression tablets in the wavebands of 0.25-2.4μm and 3-12μm were measured. By utilizing the Krames-Kronig(K-K) algorithm and the Mie scattering theory, two important optical parameters namely complex refractive index(CRI) and mass extinction coefficient of microbial spores were calculated and analyzed, then we measured the transmittance of bioaerosols under dynamic conditions from ultraviolet to far-infrared wavebands and the mass extinction coefficients of the bioaerosols in full optical band were obtained. The results showed that the optical properties of different microbial spores in specific optical wavebands had significant variability. This study can help to comprehensively understand and quantitatively study the general and specific optical properties of microbial spores and provide new ideas for the research of novel extinction materials.