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Synthesis, characterization and formation mechanism of monodispersed Gd2O2S:Eu3+ nanocrystals

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Abstract

Monodispersed Gd2O2S:Eu3+ nanostructures with tunable morphologies have been selectively fabricated by solvothermal method in the presence of stable inorganic precursors avoiding metalorganic precursors. The size and morphology of the products were controlled successfully by adjusting the reaction conditions. The products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), selected-area electron diffraction (SAED) and X-ray photoelectron spectroscopy (XPS). The corresponding UV absorption and photoluminescence excitation spectra show a significant blue-shift confirming the quantum confinement effect. A possible growth mechanism for the formation of monodispersed Gd2O2S:Eu3+ nanocrystals has been proposed. The luminescence mechanism and the size dependence of their fluorescence properties are also discussed.

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Acknowledgments

The authors wishes to gratefully thank the NIIST (CSIR), Trivandrum, IGCAR, Kalpakkam, STIC, Cochin, and IICT (CSIR), Hyderabad for extending instrumentation facilities.

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Authors and Affiliations

  1. Department of Physics, Sree Sevugan Annamalai College, Devakottai, 630 303, Tamil Nadu, India

    J. Thirumalai, R. Chandramohan & T. A. Vijayan

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  1. J. Thirumalai
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  2. R. Chandramohan
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  3. T. A. Vijayan
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Correspondence to R. Chandramohan.

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Thirumalai, J., Chandramohan, R. & Vijayan, T.A. Synthesis, characterization and formation mechanism of monodispersed Gd2O2S:Eu3+ nanocrystals. J Mater Sci: Mater Electron 22, 936–943 (2011). https://doi.org/10.1007/s10854-010-0240-6

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  • DOI: https://doi.org/10.1007/s10854-010-0240-6

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