In this study, zinc oxide nanoparticles were synthesized by using an atmospheric-pressure plasma jet in NaOH-HNO 3 electrolytic system. Atmospheric-Pressure Plasma Jet was successfully used as the cathode and Znsheet was used as the anode. The characterization of zinc oxide was obtained by X-ray powder diffraction (XRD), Fourier transformation infra-red (FTIR) and transmission electron microscope (TEM). The results show that the morphology of zincoxide nanocrystals obtained by this technology is mainly dependent on the electrolytic media, current density and reaction temperature. The average grain size of ZnO nanoparticles is around 50.4 nm. These results encourage preparing these nanostructures for using in a great interest applications in solar cells, UV light emitting diodes, gassensors, etc. This technique is low cost, scalable and general and should allow a wide range of nanoparticle materials to be synthesized in the gas or liquid phase.

In this work, the electrical properties and optimum conditions of the plasma sputtering system have been studied. The electrical properties such as Paschen's curve, current-voltage, current pressure relations, the strength of magnetic field as a function of inter-electrode distance, the influence of gas working pressure and argon-oxygen ratio on the electrical characterization were studied to determine the basic optimum condition of the system operation. the discharge current as a function of discharge voltage showed high discharge current at 2.5 cm.  These parameters represent the basic conditions to operate any plasma sputtering system which are the right behavior to build up and design the discharge an electrode. The ideal conditions of these homemade systems were qualified to prepare the various nanostructure thin films. The  two electrodes were made of copper  because of its  good conductivity, and to avoid the power dissipation  inside discharge chamber.