Influence of Shell Parameters on Optical Properties of Spherical Metallic Core-Oxide Shell Nanoparticles

Abstract

Different metal homogeneous nanoparticles have been extensively studied in recent years due to their wide range of potential applications. It is very interesting to investigate core-shell nanoparticles with oxide shell from core metal. The formation of oxide shell on metallic nanoparticles can be achieved by different chemical and physical methods including also natural oxidation of pure metallic nanoparticles in gaseous or liquid media, containing oxygen components (air, water, etc.). We numerically calculated efficiency factors of absorption Kabs, scattering Ksca, and extinction Kext of radiation with wavelength in the spectral interval 150-1000 nm by spherical homogeneous metallic and two-layered (metal core-oxide metal shell) nanoparticles: Al, Al-Al2O3 and Zn, Zn-ZnO with core radii in the range 5-50 nm and shell thickness 5 nm. Analysis of presented results has been carried out.