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 SiO2-Au- and Fe3O4-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. SiO2-Au- and Fe3O4-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.