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Influences of Co doping on the structural and optical properties of ZnO nanostructured

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Abstract

Pure and Co-doped ZnO nanostructured samples have been synthesized by a chemical route. We have studied the structural and optical properties of the samples by using X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), field-emission transmission electron microscope (FETEM), energy-dispersive X-ray (EDX) analysis and UV–VIS spectroscopy. The XRD patterns show that all the samples are hexagonal wurtzite structures. Changes in crystallite size due to mechanical activation were also determined from X-ray measurements. These results were correlated with changes in particle size followed by SEM and TEM. The average crystallite sizes obtained from XRD were between 20 to 25 nm. The TEM images showed the average particle size of undoped ZnO nanostructure was about 20 nm whereas the smallest average grain size at 3% Co was about 15 nm. Optical parameters such as absorption coefficient (α), energy band gap (E g ), the refractive index (n), and dielectric constants (σ) have been determined using different methods.

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Authors and Affiliations

  1. King Abdullah Institute for Nanotechnology, King Saud University, Riyadh, 114 51, Saudi Arabia

    M. A. Majeed Khan, M. Wasi Khan, Mansour Alhoshan, M. S. AlSalhi & A. S. Aldwayyan

  2. Chemical Engineering Department, King Saud University, Riyadh, 114 21, Saudi Arabia

    Mansour Alhoshan

  3. Department of Physics and Astronomy, King Saud University, Riyadh, 114 51, Saudi Arabia

    M. S. AlSalhi & A. S. Aldwayyan

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  1. M. A. Majeed Khan
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  2. M. Wasi Khan
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  3. Mansour Alhoshan
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  4. M. S. AlSalhi
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  5. A. S. Aldwayyan
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Correspondence to M. A. Majeed Khan or M. Wasi Khan.

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Majeed Khan, M.A., Wasi Khan, M., Alhoshan, M. et al. Influences of Co doping on the structural and optical properties of ZnO nanostructured. Appl. Phys. A 100, 45–51 (2010). https://doi.org/10.1007/s00339-010-5840-8

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  • DOI: https://doi.org/10.1007/s00339-010-5840-8

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