Abstract
In the present study, we have synthesized undoped and Cu2+-doped CdO nanopowders by a mild solution method at room temperature. Powder X-ray diffraction, optical absorption, electron paramagnetic resonance and Fourier transform infrared measurements are used to characterize prepared powders. The powder X-ray diffraction patterns reflect the cubic crystal structure for undoped and Cu2+-doped CdO powders. Surface morphology images and compositional features are studied by scanning electron microscopy and energy-dispersive X-ray techniques, respectively. The optical absorption spectra exhibit a single absorption band for Cu2+-doped sample, which is the characteristic absorption band of distorted octahedral site symmetry. By correlating the electron paramagnetic resonance and optical results for Cu2+-doped CdO nanopowder, bonding parameters are evaluated. These values indicate the partial covalency of in-plane σ (α 2) and in-plane π bonding (\( \beta_{1}^{2} \)) between copper ions and their ligands. The FT-IR spectra indicate the fundamental vibrations of Cd–O.
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Acknowledgments
L. V. Krishna Rao is grateful to the UGC-SERO (F.ETFA-PAN041), Hyderabad, for permitting him to pursue the Ph.D. program as an FDP scholar under the XI plan. R. V. S. S. N. Ravikumar is thankful to the UGC-DRS programme, Level-III, for providing financial assistance to the Department of Physics, Acharya Nagarjuna University, and partially the National Research Foundation of Korea (NRF) funded by the Korea government (MEST) (NRF-2012R1A1A2009392).
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Venkata Reddy, C., Shim, J., Byon, C. et al. Room temperature synthesis and spectral characterization of Cu2+-doped CdO powder. Indian J Phys 90, 359–364 (2016). https://doi.org/10.1007/s12648-015-0753-1
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DOI: https://doi.org/10.1007/s12648-015-0753-1