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Green synthesis of CdSe/ZnS core-shell quantum dot nanophosphors and its Poly methyl methacrylate composite thin film in the visible spectral range

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Abstract

We herein report the synthesis of highly-fluorescent CdSe/ZnS core-shell quantum dots (QDs) nanophosphors via a simple, non-phosphine and one pot synthetic method in the absence of an inert atmosphere. The as-prepared nanocrystallites were characterized by Fourier transform infrared spectroscopy (FTIR), ultraviolet-visible (UV-vis) and photoluminescence spectroscopy, transmission electron microscopy (TEM) and high resolution TEM (HRTEM). The obtained CdSe/ZnS QDs were of high quality with sharp absorption peaks, bright luminescence, narrow emission width and high PL quantum yield (up to 74 %) without any size sorting. The structural analysis showed that the as-synthesised QDs are small and spherical in shape with narrow size distributions while the presence of the lattice fringe in the HRTEM image confirmed the crystallinity of the material. The dispersion of the obtained core-shell QDs in PMMA matrix resulted in the fabrication of highly fluorescent PMMA- CdSe/ZnS core shell QDs polymer nanocomposite film.

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Acknowledgments

The authors thank the Department of Science and Technology (DST Nano mission (SR/NM/NS- 54/2009), National Research Foundation (NRF), South Africa under the Nanotechnology Flagship Programme (Grant no: 90045) and CV Raman Fellowship programme for financial support. The financial support from UGC-Government of India through SAP and DST- Government of India through FIST and PURSE programme are also gratefully acknowledged.

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Authors and Affiliations

  1. Department of Chemistry, Cape-Peninsula University of Technology, P.O. Box 652, Capetown, 8000, South Africa

    Samuel. O. Oluwafemi & Sneha Mohan

  2. International and Interuniversity Centre for Nanoscience and Nanotechnology, Mahatma Gandhi University, Kottayam, Kerala, 686560, India

    Sneha Mohan, Theertha Soman, Nandakumar Kalarikkal & Sabu Thomas

  3. Amal Jyothi College of Engineering, Kanjirappally, Kottayam, Kerala, 686560, India

    Soney. C. George

  4. Institut Jean Lamour, Université de Lorraine, Vandoeuvre-lès-Nancy, F-54500, France

    Patrice Miska & Didier Rouxel

  5. CNRS, UMR 7198, Vandoeuvre-lès-Nancy, F-54500, France

    Patrice Miska & Didier Rouxel

  6. School of Pure and Applied Physics, Mahatma Gandhi University, Kottayam, Kerala, 686560, India

    Nandakumar Kalarikkal

  7. School of Chemical Sciences, Mahatma Gandhi University, Kottayam, Kerala, 686560, India

    Sabu Thomas

Authors
  1. Samuel. O. Oluwafemi
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  2. Sneha Mohan
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  3. Theertha Soman
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  4. Soney. C. George
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  5. Patrice Miska
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  6. Didier Rouxel
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  7. Nandakumar Kalarikkal
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  8. Sabu Thomas
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Correspondence to Samuel. O. Oluwafemi.

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Oluwafemi, S.O., Mohan, S., Soman, T. et al. Green synthesis of CdSe/ZnS core-shell quantum dot nanophosphors and its Poly methyl methacrylate composite thin film in the visible spectral range. MRS Online Proceedings Library 1748, 26–31 (2014). https://doi.org/10.1557/opl.2015.76

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  • DOI: https://doi.org/10.1557/opl.2015.76

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