Ion-beam synthesis of copper nanoparticles in transparent ceramics of aluminum-magnesium spinel

摘要

Experimental studies of aluminum-magnesium spinel modified by Cu2+ ions as a result of pulsed ion bombardment were carried out. The analysis of the modified samples with X-ray photoelectron spectroscopy (XPS) revealed the presence of metallic copper (Cu-0) along with a small amount of oxidized copper at implantation doses of F = 5 x 10(16) cm(-2). It has been found with optical spectroscopy methods that, intrinsic (F, F+, anti-site) and impurity (Cu-related) optically active centers are formed in the matrix under the action of a beam of accelerated ions, and a complex dependence of the optical absorption intensity of these centers is observed with the increase of the annealing temperature. Experimental data allows us to conclude that the synthesis and evolution of metal nanoparticles formed in the surface layer of transparent ceramics MgAl2O4 showed a number of paradoxical properties, to interpret which a number of new physics of solid state concepts turned out to be adequate: the intermittency concept, which found its implementation in the Mott-Gurney kinetics, and the hierarchy of defective structure, which was realized in the trophic chains of defects.