Abstract:
On this study Zinc oxide nanoparticles were prepared by hydrothermal method at low temperature (60°C), also ZnO nanoparticles were grown as a thin film on glass substrate. In addition, a zinc oxide nanoparticles grown as a thin film on glass substrate was coated with another layer of CuO nanoparticles. The Shape and size of these grown nanostructures were then characterized by UV absorption, SEM, and EDX technique. Band gap of ZnO was calculated from UV absorption measurement and it was found to be 3.66eV, a value that exceeds, the reported value of ZnO band gap namely3.37eV.The increase of band gap of the prepared ZnO was attributed to presence of Si, Mg, Ca, Al impurities which were evidence from EDX analysis. Particle size of ZnO on two dimensions (x, y) and the distance between crystals was estimated from SEM analysis
