Effect of molarity variation on band gap of CuO Nanostructures Synthesized by wet chemical method

Abstract

The wet chemical method has been implemented to synthesize CuO nanostructures at 100 0 C. The monoclinic phase structure of CuO nanostructures has been affirmed by X-ray Diffraction (XRD) pattern. Crystal size and dislocation density of the nanostructures have been calculated from XRD data. UV-visible absorption spectra have been used to estimate band gap of the prepared CuO nanostructures. The refractive index and dielectric constant of CuO nanostructures have been calculated from band gap which shows an increase with the decrease of the band gap. Field Emission Scanning Electron Microscopy (FESEM) has been used to inspect the crystals' surface morphology.

Physical properties of nanostructured ZnO thin films deposited by DC magnetron sputtering method with different volume of O2 in carrier gas

“…These peak shifted to the lower wavelength region (blue shift). This blue shift occured due to quantum confinement effect [43] that led to the increase of the band gap energy and decrease in crystallite size [44]. Therefore, the optical property of ZnO thin film was strongly associated to the structural and morphological properties.…”