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Structural, optical and magnetic characterization of Cu-doped ZnO nanoparticles synthesized using solid state reaction method

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Abstract

Polycrystalline undoped and Cu-doped Zinc oxide (Zn0.98Cu0.02O) nanocrystals were successfully synthesized by solid-state reaction method. The micro structural, optical and magnetic properties have been characterized using powder X-ray diffraction (XRD), Scanning electron microscopy (SEM), Energy dispersive analysis using X-rays (EDAX), UV–Visible spectroscopy, Photoluminescence, Vibrating sample magnetometer and Electron paramagnetic resonance spectroscopy. XRD pattern reveals that the samples possess hexagonal wurtzite structure of ZnO without any secondary phase after copper doping. Optical absorption analysis of the samples showed a red shift in absorption band edge with copper doping in ZnO. Photoluminescence spectra of the samples shows prominent peaks corresponding to near band edge UV emission and defect related green emission in the visible region at room temperature and their possible mechanism have also been discussed. Magnetic measurements using VSM showed that the nanocrystalline copper doped ZnO exhibits ferromagnetic behaviour at 300 K. EPR analysis also confirms the substitution of Zn site by Cu2+.

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Acknowledgments

The authors are thankful to Central Instrumentation Facility (CIF), Pondicherry University, India, for having allowed to use VSM, SEM and PL and also thankful to DST-FIST for funding XRD in the Department of Physics, Pondicherry University, India and facility provided for UV–Visible and EPR analysis at Department of chemistry, Pondicherry University, India.

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  1. Department of Physics, School of Physical, Chemical and Applied Sciences, Pondicherry University, Puducherry, 605 014, India

    R. Elilarassi & G. Chandrasekaran

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  1. R. Elilarassi
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  2. G. Chandrasekaran
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Correspondence to R. Elilarassi.

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Elilarassi, R., Chandrasekaran, G. Structural, optical and magnetic characterization of Cu-doped ZnO nanoparticles synthesized using solid state reaction method. J Mater Sci: Mater Electron 21, 1168–1173 (2010). https://doi.org/10.1007/s10854-009-0041-y

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