College of Education for Pure Science

Master Thesis Viva in the College of Education for Pure Science entitled ” Study of optical and structural properties of CuO,NiO oxides Nanoparticles prepared by chemical bath deposition (CBD) method “The College of Education for Pure Science, University of Mosul, has done the Master Thesis Viva entitled ” Study of optical and structural properties of CuO,NiO oxides Nanoparticles prepared by chemical bath deposition (CBD) method “,On Tuesday, August 16, 2022, the College staff including the respected Dean of the College, Assistant Professor Dr. Qais Ismail Ibrahim, the Honorable Scientific Associate and Administrative Associate, the Honorable Head of the Department of Physics, and a number of the college’s teachers were attended the viva. This study, presented by the Master student Mohammed Basil Abdul-Jabbar Al-Shabaki in the Department of Physics,In this study, the process of converting Micro-Oxides NiO and CuO into nanostructured oxides was carried out by depositing them in the form of thin films by using Chemical Bath Method (CBD) at normal atmospheric pressure and constant floor temperature 85℃ with more than one steps process between the precipitate and the filtrate to obtain small size nanoparticles, the separation steps of CuO films led to a decreases in it’s grain size from 34.8nm to 26.80nm, while in the NiO films, the separation steps led to decreasing in it’s grain size from 27.73nm to 21.73nm.By weight, mixing processes of 0.2% and 0.8% were carried out for each of the Oxides NiO and CuO, respectively. Then all the samples prepared as films were annealed by thermal annealing processes at different temperatures (200,250,300,350) ℃.The study of the optical properties, which included all of the transmittance, reflectivity and absorption, in addition the optical constants (absorption coefficient, attenuation coefficient, reflectivity and refractive index) was carried out using a spectrometer (UV-VIS), while calculating the energy gap for all the prepared films. The structural properties were also studied using X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM), while the surface properties of the films were studied using an Optical Microscope.All the prepared CuO films measured by X-Ray Diffraction (XRD) showed that are of polycrystalline structure and monoclinic type, while NiO films were of polycrystalline structure and cubic type. While SEM measurements showed the appearance of nanoparticles in different shapes, depending on the separation steps, mixing ratios, and the annealing temperature.As for optical measurements, the transmittance increases with the increasing in the separation steps of films for both pure and mixing films, while it varied with different temperatures. As for the absorbance, it decreased with increasing of the phases of separation. The lowest energy gap was recorded for the phases of separation is 2.45eV for the separation phase, for the first separation steps for CuO films, while for the films the mixing ratio of 80% and 20% for CuO and NiO films respectively was 2. 9eV.The Viva committee was chaired by Prof. Dr. Abdullah Mahmoud Ali , University of Tikrit /College of Education for Pure Science and the membership of Asst. Prof. Dr. Mahmoud Ahmed Hmoud, University of Mosul/College of Science, Lecturer Dr. Moataz Saleh Hassan, University of Mosul / College of Education for Pure Science and under the supervision and membership of Prof. Dr. Raad Ahmed Rasool, University of Mosul / College of Education for Pure Science.