Conditions For "Cold" Gas-Discharge Synthesis of Zinc Oxide And Silver Sulfide Nanostructures Under Automatic Assisting With Ultraviolet Radiation

Abstract

The characteristics and parameters of the plasma of an overvoltage nanosecond discharge in
oxygen, which was ignited between zinc electrodes in oxygen, are presented. Zinc vapors
were introduced into the discharge due to microexplosions of natural inhomogeneities on
the surfaces of zinc electrodes in a strong electric field. This creates the prerequisites for the
synthesis of thin nanostructured zinc oxide films, which can be deposited on a rigid dielectric
substrate placed near the electrode system.
The results of a study of the optical characteristics of an overvoltage nanosecond discharge
with a discharge gap of d=2mm are presented. The identification of the plasma radiation
spectra made it possible to establish the main excited plasma products that form the plasma
UV radiation spectrum and simultaneously act as a pulsed source of clusters and small
particles of zinc oxide.
The characteristics of an overvoltage nanosecond discharge in air between polycrystalline
electrodes made of a supericonic conductor Ag2S are presented. In the process of
microexplosions of inhomogeneities on the working surfaces of electrodes in a strong electric
field, vapors of the Ag2S compound and its dissociation products in plasma are introduced
into the interelectrode space. This creates prerequisites for the synthesis of thin structured
films that have the properties of superionic conductors and can be deposited on a dielectric
substrate placed near the discharge gap. The spatial, electrical, and spectral characteristics of
the discharge, the Raman scattering spectra of the synthesized films, and the homogeneity of
their surface are studied.