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The current research work, Ni doped CuO nano structured fibres have been manufactured using self-assembled method called innovative spin coater. The prepared nano structures were exposed to various high temperatures like 400 °C, 500 °C and 600 °C and then slowly cooled to room temperature (annealing process). The structural analysis of Ni doped CuO nano fibres have been studied through Field Emmison Scanning Electron Microscope (FE - SEM), elemental composition investigation of the Ni doped nano fibres were examined using Energy Dispersive X- ray spectroscopy (EDS). The degree of crystalline nature existent in the nickel dopped copper oxide nano fibres have been inspected with help of X-ray Diffraction spectrum (XRD). The optical sensitivity of the prepared nanostructures such as absorption, reflectance and transmittance have been explored through UV- Vis spectrum. The attained XRD results of the synthesized copper oxide nano fibres disclose the existence of perfect nano crystalline segment with monoclinic crystal phase. The FE - SEM micro photographs reveal that each developed nickel with CuO nano fibre clearly shows the spherical nano scale crystallites and are completely free from defects and contaminations. The nickel dopped copper oxide nano fibres were annealed at 600 °C temperature evidently divulges the formation of spherical moulded nano structures as equated with nano structures annealed at 400 °C temperature. The forbidden energy band gap value of nickel doped copper oxide nano fibres was found to be about 2. 7 eV. The obtained structural and optical analysis of nickel doped copper oxide nano fibres have been clearly showing that the developed nano structures may have abundant applications in the various gas sensing field. [ABSTRACT FROM AUTHOR]

In this present investigation, Mn doped CuO nanofibers were successfully synthesized by using newly designed spin coating generator. All the fabricated nanofibers have been subjected to post annealing at 400 °C, 500 °C and 600 °C. The surface morphology of Mn doped CuO nano structures was analysed using scanning electron microscope(SEM).The micro structural and chemical analysis of the Mn doped CuO nano structures have been examined using X-ray diffraction pattern (XRD) and Energy dispersive X- ray analysis (EDS). The optical characteristics of synthesized Mn doped CuO nanofibers like absorption and transmittance were investigated by UV- Vis spectroscopy. The obtained XRD pattern reveals the occurrence of nano crystalline phase with monoclinic crystal structure. The SEM micrographs reveals that all the fabricated Mn doped CuO nanostructures exhibit the spherical shaped nanoparticles and they are defect free. The Mn doped CuO nano structure annealed at higher temperature clearly reveals the formed spherical shaped sturures as compared with lower annealing temperature. The forbidden band gap of Mn doped CuO nanostructures are found to be around 2. 7 eV. Based on the structural and optical properties of Mn doped CuO nano structures it was concluded that the prepared and annealed samples may have numerous applications in sensing field. [ABSTRACT FROM AUTHOR]