Preparation and characterization of ZnO nano-particles

ZnO plays an important role in many semiconductors technological aspects. In the present work zinc oxide nano particles were prepared by chemical method , using ( Zn (NO₃)₂.6H₂O) and (NaOH)with different concentrations(0.25,0.5,0.75, and,1)M(which lead to different PH) at 70ºC,and study the effect of temperature on the shape and particle size . A variety of techniques like X-ray diffraction (XRD),Scanning Electron Microscopy (SEM)and (AFM ). X-ray diffraction revealed the quartzite structure of ZnO . The obtained show that no impurities were found in the XRD pattern. Also the diffraction peaks are intensive and very sharp. Thus high purity hexagonal ZnO nanocrystals could be obtained by this synthesis process, and (SEM)and (AFM )show that the result were nano particle with particle size (15-30),(20-35),and(20-40)nm for the three first concentration ,and for the last one, the SEM image demonstrates clearly the formation of Short rods ZnO nanoparticles of diameter ~25-62 nm and length ~ (200 nm -500 nm)