Synthesis of Copper Oxides Nanostructures by an Overstressed Nanosecond Discharge in Atmospheric Pressure Air between Copper Electrodes

Abstract

The results of study of the characteristics and parameters of plasma of a high-current nanosecond discharge in atmospheric pressure air between copper electrodes under conditions of strong overstress of the discharge gap are presented. Under such conditions, favorable conditions are created for igniting an atmospheric pressure diffuse discharge in an inhomogeneous electric field. The spatial, electrical and optical characteristics of the discharge, as well as the parameters of the air plasma with small additions of copper vapor are studied. It is shown that this type of discharge can be used for the synthesis of copper oxides nanostructures.

Characteristics of an Overstressed Discharge of Nanosecond Duration between Electrodes of Chalcopyrite in High Pressure Nitrogen

“…The emission spectrum of overstressed nanosecond discharges in the spectral range 200-230 nm consisted of a group of closely spaced spectral lines of an atom and a singly charged copper ion and lowintensity lines of a singly charged indium ion (spectral lines 1-13; Table 1). The spectral lines of copper were similar to those that we observed in the emission spectra of plasma overstressed nanosecond discharge between copper electrodes in atmospheric pressure air at a distance between copper electrodes of d = 2 mm [14,15]. As for the discharge between copper electrodes, the intensity of this group of spectral lines decreased with decreasing nitrogen pressure from 202 to 101 kPa.…”

“…As shown in copper and indium atoms are less bound in the chalcopyrite molecule, which is a component of massive electrodes [10]. Therefore, the line part of the plasma radiation spectrum is mainly due to individual spectral lines of atoms and singly charged copper and indium ions, as for a laser plasma, which was formed on the target surface from the compound under vacuum, as for a gas-discharge air plasma [11][12][13][14].…”

Features of High Current Nanosecond Discharge in Mixture of High Pressure CuInSe<sub>2 </sub> Chalkopyrite Vapor and Argon

“…The discharge radiation spectrum consisted of the group of intense spectral lines of the copper atom and the single charged indium ion in the spectral range of 200-230 nm. A similar phenomenon was observed in the plasma of the over-voltage nanosecond discharge at the atmospheric pressure and the distance between copper electrodes d=2 mm [15,16] (in the part of atoms and single charged copper ions). As the argon pressure increased from 101 to 202 kPa, the intensity of the spectral lines of 218.17 and 219.95 nm of the copper atom decreased.…”

Parameters of Nanosecond Overvoltage Discharge Plasma in a Narrow Air Gap between the Electrodes Containing Electrode Material Vapor

“…Thin nanostructured copper oxide films were synthesized on a glass substrate mounted near the discharge. Some spatial and optical parameters of those nanostructures were reported in our work [42].…”