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Structural and optical characterization of Sm-doped ZnO nanoparticles

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Abstract

Micro-structural changes in zinc oxide (ZnO) nanoparticles induced by the substitution of \(\hbox {Zn}^{2+}\) in ZnO by a rare earth (RE) metal ion, \(\hbox {Sm}^{3+}\), are investigated. Both pristine and Sm-doped ZnO with a nominal doping concentration of 1, 2 and 4% of Sm using a simple wet-chemical synthetic route followed by calcination at a high temperature of \(900{^{\circ }}\hbox {C}\), are synthesized. Structural investigations are primarily conducted using X-ray powder diffraction (XRPD) and scanning electron microscopy techniques. Evolution of structural parameters (unit cell parameters, average crystallite size, crystallinity percentage, lattice strain, stress, energy density and atomic packing factor) upon Sm doping is investigated together with Rietveld refinement and Le Bail analysis techniques. XRPD data confirmed that the synthesized nanostructures crystallize in a wurtzite hexagonal structure, the dopant Sm is incorporated into the Zn lattice and the annealing treatment plays a crucial role in determining the structural and optical properties of RE-metal-doped nanoparticles. Values of the optical band gap energy estimated from optical absorbance measurements reveal a widening of the band gap.

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Acknowledgements

We thank Y Kaya for his assistance and discussion on the determination of optical energy gaps.

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Authors and Affiliations

  1. Department of Chemistry, Bursa Technical University, Bursa, 16310, Turkey

    H E Okur

  2. Department of Physics, Faculty of Science, Firat University, Elazig, 23119, Turkey

    N Bulut, T Ates & O Kaygili

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  1. H E Okur
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  2. N Bulut
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  3. T Ates
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  4. O Kaygili
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Correspondence to H E Okur.

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Okur, H.E., Bulut, N., Ates, T. et al. Structural and optical characterization of Sm-doped ZnO nanoparticles. Bull Mater Sci 42, 199 (2019). https://doi.org/10.1007/s12034-019-1877-2

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