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Zinc oxide nanoparticles were synthesized by DC arc plasma in pure oxygen atmosphere. High DC currents were passed through two approaching zinc rods in different oxygen pressures between 70 mbar to 1400 mbar. Samples were characterized by TEM, SEM, XRD, EDX and electron diffraction analysis. The formation of zinc oxide nanoparticles were successfully proved by those analyses, although in some cases we have some unwanted materials. The XRD patterns show crystalline formation of zinc oxide, but in low pressures we have an excess peak belong to pure zinc. The height of this peak was reduced by increase in oxygen and finally vanished completely at high pressure. The TEM and SEM images of samples show that in low pressures the sample mainly tends to have rods like shapes structures, but by increasing the oxygen pressure the structures steady revolve to the hexagonal nano crystals. Upon the resulted data, the best condition of arc plasma for desire product was inferred. |