Characterization of morphological and electrical properties of two-component metal oxide nanomaterials

In this thesis study, two-component metal oxide nanomaterials were produced using two different methods and the structural, morphological,optical and electrical properties of the produced samples were investigated. For this purpose, two-component metaloxide nanomaterials sol-gel spin coating and hydrothermal method were used by doping undoped CdO and different ratios (0.2%, 0.5%, 1% and 2%) CuO. It has been successfully they are produced as thin film and nanopowder. X-ray diffraction (XRD), Atomic Force Microscopy (AFM), Scanning Electron Microscope (SEM), X-Ray Spectroscopy (EDX) for structural analysis of produced nanopowders and thin films, Energy Dispersive Ultraviolet-Visible Spectroscopy (UV-Vis) for optical analysis ), the structural properties were characterized using Fourier transform spectroscopy (F-TIR), and the effects of doping on these properties were investigated. In addition, the two-point probe method was used to determine the conductivity of the produced thin film and nanopowder, and the production optimization was determined. From the X-ray diffraction patterns of the thin films and nanopowders obtained, it was determined that the structures were polycrystalline and face-centered cubic. From the 2D and 3D Atomic Force Microscope (AFM) images of the thin films in the 10nm x10nm area, the thin films appear to be in the form of relatively dense and homogeneous rod-like nanostructures at the micrometer scale. From the FESEM images of the nanopowders, it was seen that the structure was mostly agglomeration structures consisting of spherical nanoparticles, and from the EDX images, the structure was composed of CdO and CuO. Optical properties of undoped CdO and CuO doped CdO semiconductor nanopowders and thin films obtained by sol-gel and hydrothermal methods were investigated, they were found to have a direct band transition, and it was also determined that the band gap was between 2.56 and 1.74 eV. From the Fourier transform infrared spectroscopy of the produced thin films and nanopowders, the stretch vibration modes are based on the CdO and CuO structure. The FTIR spectrum revealed characteristic vibrational frequencies at 505 and 620 cm-1, which were assigned to Cu-O and Cd-O stretching vibrations, respectively. The intrinsic conductivity values of nanopowder and thin films were determined using the two-point probe method. As a result of the measurement, it was concluded that the material is a semiconductor. The obtained results show that the structural, morphological, optical and electrical properties of thin films and nanopowders vary depending on the doping concentration. Our aim is to shed light on the applications in technology of two-component metal oxide nanomaterials doped with CdO and CuO by using two different methods.