This work was devoted to synthesizing α-γ Al 2 O 3 nanocomposite by the electrolysis method. A plate of aluminum was used as the anode, while the graphite rod was used as the counter electrode (cathode). The structure and morphology were investigated and characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The results indicated the average size of α-γ Al 2 O 3 nanocomposite was smaller than 10 nm. The value of inhibition zone indicated the nanocomposite's effect on different bacteria. The results demonstrated the newly synthesized nanocomposite as promising antimicrobial agents against bacteria.

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.

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