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Influence of source concentration on structural and optical properties of SnO2 nanoparticles prepared by chemical precipitation method

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Abstract

In present work, a systematic study has been carried out to understand the influence of source concentration on structural and optical properties of the SnO2 nanoparticles. SnO2 nanoparticles have been prepared by using chemical precipitation method at room temperature with aqueous ammonia as a stabilizing agent. X-ray diffraction analysis reveals that SnO2 nanoparticles exhibit tetragonal structure and the particle size is in range of 4.9–7.6 nm. High resolution transmission electron microscopic image shows that all the particles are nearly spherical in nature and particle size lies in range of 4.6–7 nm. Compositional analysis indicates the presence of Sn and O in samples. Blue shift has been observed in optical absorption spectra due to quantum confinement and the bandgap is in range of 4–4.16 eV. The origin of photoluminescence in SnO2 is found to be due to recombination of electrons in singly occupied oxygen vacancies with photo-excited holes in valance band.

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Authors and Affiliations

  1. Department of Physics, SVS College of Engineering, Coimbatore, India

    M. Saravanakumar & K. Prabaharan

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

    S. Agilan, N. Muthukumarasamy, A. Marusamy & A. Ranjitha

  3. Department of Physics, Indian Institute of Science, Bangalore, India

    P. Uma Maheshwari

Authors
  1. M. Saravanakumar
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  2. S. Agilan
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  3. N. Muthukumarasamy
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  4. A. Marusamy
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  5. K. Prabaharan
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  6. A. Ranjitha
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  7. P. Uma Maheshwari
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Correspondence to M. Saravanakumar.

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Saravanakumar, M., Agilan, S., Muthukumarasamy, N. et al. Influence of source concentration on structural and optical properties of SnO2 nanoparticles prepared by chemical precipitation method. Indian J Phys 88, 831–835 (2014). https://doi.org/10.1007/s12648-014-0499-1

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  • DOI: https://doi.org/10.1007/s12648-014-0499-1

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