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Cu2+ substituted Cr2O3 nanostructures prepared by microwave-assisted method: an investigation of its structural, morphological, optical, and dielectric properties

  • Original Paper: Nano-structured materials (particles, fibers, colloids, composites, etc.)
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Abstract

We have reported the preparation and characterization of both pure and Cu2+ doped Cr2O3 nanoparticles with different dopant concentrations by the simple, cost-effective microwave-assisted method. As-prepared samples have undergone various characterizations to get an insight into the Cr2O3 nanoparticles. The XRD pattern showed the rhombohedral phase structure of Cr2O3 with an average particle size of ±14 nm. The surface and morphology analysis (FESEM and TEM) revealed a nearly spherical shape with an average particle size of 30–50 nm and the presence of the elemental composition of Cr and Cu was confirmed by the EDAX spectrum. The optical properties (UV–Vis and PL spectra) of Cr2O3 nanostructures were also studied, and results were found to support our further studies. Finally, electrical and dielectric characterization showed enhanced electrical conductivity concerning temperature and frequency.

Highlights

  • Pure and Cu-doped Cr2O3 nanostructures were successfully synthesized.

  • Spherical shape morphology with loosely agglomeration was observed.

  • Electrical studies showed enhanced dielectric constant with temperature.

  • High conductivity of Cu-doped Cr2O3 was in consequence of polaron hopping.

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Authors and Affiliations

  1. Nyruthi Arts and Science College, Kariyampalayam, Annur, Coimbatore, Tamil Nadu, 641653, India

    K. Mohanapandian

  2. Nehru Institute of Engineering and Technology, T.M. Palayam, Coimbatore, Tamil Nadu, 641105, India

    S. Shalini Packiam Kamala, P. Periasamy & N. Sathiya Priya

  3. School of Advanced Sciences, Kalasalingam Academy of Research and Education, Srivilliputtur, Tamil Nadu, 626126, India

    B. Selvakumar

  4. E.G.S Pillay Arts & Science College, Nagapattinam, Tamil Nadu, 611002, India

    K. Senthilkannan

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  1. K. Mohanapandian
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  2. S. Shalini Packiam Kamala
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  3. P. Periasamy
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  4. N. Sathiya Priya
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  5. B. Selvakumar
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Mohanapandian, K., Kamala, S.S.P., Periasamy, P. et al. Cu2+ substituted Cr2O3 nanostructures prepared by microwave-assisted method: an investigation of its structural, morphological, optical, and dielectric properties. J Sol-Gel Sci Technol 99, 546–556 (2021). https://doi.org/10.1007/s10971-021-05596-w

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  • DOI: https://doi.org/10.1007/s10971-021-05596-w

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