title: Synthesis and structural characterization of Co2+ ions doped ZnO nanopowders by solid state reaction through sonication.
abstract: Cobalt ions doped zinc oxide nanopowder was prepared at room temperature by a novel and simple one step solid-state reaction method through sonication in the presence of a suitable surfactant Sodium Lauryl Sulphate (SLS). The prepared powder was characterized by various spectroscopic techniques. Powder XRD data revealed that the crystal structure belongs to hexagonal and its average crystallite size was evaluated. From optical absorption data, crystal fields (Dq), inter-electronic repulsion parameters (B, C) were evaluated. By correlating optical and EPR spectral data, the site symmetry of Co(2+) ion in the host lattice was determined as octahedral. Photoluminescence spectra exhibited the emission bands in ultraviolet and blue regions. The CIE chromaticity coordinates are also evaluated from the emission spectrum. FT-IR spectra showed the characteristic vibrational bands of Zn-O.
authors.affiliation: Department of Physics, University College of Sciences, Acharya Nagarjuna University, Nagarjuna Nagar 522 510, A.P., India.
authors.forename: B
authors.initials: B
authors.lastname: Babu
authors.forename: Ch
authors.initials: Ch
authors.lastname: Rama Krishna
authors.forename: Ch
authors.initials: Ch
authors.lastname: Venkata Reddy
authors.forename: V
authors.initials: V
authors.lastname: Pushpa Manjari
authors.forename: R V S S N
authors.initials: RV
authors.lastname: Ravikumar
mesh_terms: D002413:Cations, Divalent / Q000138:chemical synthesis / Q000737:chemistry*; D003035:Cobalt / Q000737:chemistry*; D004578:Electron Spin Resonance Spectroscopy; D008163:Luminescent Measurements; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D033362:Powder Diffraction; D012967:Sodium Dodecyl Sulfate / Q000737:chemistry; D013010:Sonication; D017550:Spectroscopy, Fourier Transform Infrared; D014961:X-Ray Diffraction; D015034:Zinc Oxide / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: D002413:Cations, Divalent; D012967:Sodium Dodecyl Sulfate; D003035:Cobalt; D015034:Zinc Oxide