Investigation of the Effect of ZnSe Evaporation Conditions Using an Ytterbium Laser on the Production of Nanoparticles by this Method and on Their Properties

Abstract

Using laser evaporation method of a target with followed condensation in a flow of buffer gas (Ar or He) the preparation of ZnSe, Fe : ZnSe, Cu : ZnSe nanopowders and their properties were studied. It is shown that for the same gas pressure (100 kPa), ZnSe nanoparticles obtained in helium have a smaller average size (11 nm), than in argon (18 nm). An increase in Ar pressure from 100 to 300 kPa led to an increase in the size of nanoparticles even further 2 times. The influence of laser radiation parameters and gas parameters on productivity of nanopowders obtaining was studied process. The nanopowders had cubic and hexagonal crystalline ZnSe phases, the content of which varied within certain limits depending on gas parameters. A comparison of theoretical and experimental data suggests that a significant part of nanoparticles were formed by desublimation of vapor directly into the solid phase. The results of the first studies of pressing and sintering of ZnSe nanopowders, obtained by laser method, are shown.