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Quantum confinement effects in Gd-doped CdS nanoparticles prepared by chemical precipitation technique

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Abstract

CdS and Gd-doped CdS nanoparticles have been synthesized by chemical precipitation technique. The X-ray diffraction patterns show that the CdS and Gd-doped CdS nanoparticles exhibit hexagonal structure. The high resolution transmission electron microscope image shows that CdS and Gd-doped CdS nanoparticles have particle size lying in the range of 3.5 to 4.0 nm. Raman spectra show that 1LO, 2LO and 3LO peaks of the Gd-doped CdS nanoparticles are slightly shifted to lower wavenumber side when compared to that of CdS. Optical absorption spectra of Gd-doped CdS nanoparticles shows that absorption edge is slightly shifted towards longer wavelength side (red shift) when compared to that of CdS and this shift is due to the quantum confinement effect present in the samples.

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Acknowledgments

This work was supported by the Human Resources Development of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) Grant funded by the Korea government Ministry of Knowledge Economy (No. 20124010203170).

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Authors and Affiliations

  1. Department of Electrical and Computer Engineering, Global Frontier Center for Multiscale Energy Systems, Seoul National University, Seoul, 151-744, Republic of Korea

    M. Thambidurai & Changhee Lee

  2. Department of Physics, Coimbatore Institute of Technology, Coimbatore, India

    N. Muthukumarasamy

  3. Department of Engineering, University College of Bergen, Bergen, Norway

    Dhayalan Velauthapillai

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  1. M. Thambidurai
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  2. N. Muthukumarasamy
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  3. Dhayalan Velauthapillai
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  4. Changhee Lee
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Correspondence to M. Thambidurai or Changhee Lee.

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Thambidurai, M., Muthukumarasamy, N., Velauthapillai, D. et al. Quantum confinement effects in Gd-doped CdS nanoparticles prepared by chemical precipitation technique. J Mater Sci: Mater Electron 24, 4535–4541 (2013). https://doi.org/10.1007/s10854-013-1438-1

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