Optical characteristics of nanoparticles for effective attenuation of radiation of a black body with temperatures of 2000–4000 K

The prospects of using nanoparticles for effective attenuation of optical radiation from various natural and technological sources (fires, electrometallurgy, laser and plasma processing) with emitter surface temperatures of 2000–4000 K are studied via theoretical modeling. The radiation from the above sources can be presented as the emission of a black body with a relevant temperature. The optical characteristics were analyzed for bilayer SiO$_{2}$–Au- and Fe$_{3}$O$_{4}$–Au nanoparticles of a core–shell system with radii of 25–300 nm and shell thicknesses of 5 and 10 nm for radiation wavelengths of 200–5000 nm. SiO$_{2}$–Au- and Fe$_{3}$O$_{4}$–Au nanoparticles are found to be the good radiation attenuators (absorbers) with temperatures of 2000–4000 K at wavelengths of 200–5000 nm and seem to be promising for effective attenuation of optical radiation of high-temperature sources.