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GAMMA IRRADIATION-INDUCED CHEMICAL DECOMPOSITION-RELATED BANDGAP ENGINEERING IN SnO2 NANOPARTICLES

Author

Listed:
  • ISHAQ AHMAD

    (National Center for Physics, Islamabad 44000, Pakistan)

  • ABDUL FAHEEM KHAN

    (#x2020;Department of Materials Science & Engineering, Institute of Space Technology, Islamabad 44000, Pakistan‡Centre of Research UMPEDAC, Level 4, Wisma R&D, University of Malaya, Kuala Lumpur 59990, Malaysia)

  • ATTAULLAH SHAH

    (#xA7;National Institute of Lasers and Optronic (NILOP), Islamabad, Pakistan)

  • HINA TABASSUM

    (National Center for Physics, Islamabad 44000, Pakistan¶Physics Department, Allama Iqbal Open University, Islamabad, Pakistan)

  • ABDULLA DIALLO

    (#x2225;UNESCO-UNISA Africa Chair in Nanosciences/Nanotechnology, College of Graduate Studies, University of South Africa, Pretoria, South Africa**Nanosciences African Network (NANOAFNET), iThemba LABS-National Research Foundation, Somerset West, Western Cape Province, South Africa††Laboratoire de Photonique et de Nano-Fabrication, Faculté des Sciences et Techniques, Université Cheikh Anta Diop de Dakar (UCAD), B. P. 25114, Dakar-Fann Dakar, Senegal)

  • JAVED IQBAL

    (#x2021;‡Laboratory of Nanoscience and Technology (LNT), Department of Physics, Quaid-i-Azam University, Islamabad, Pakistan)

  • F. I. EZEMA

    (#xA7;§Department of Physics & Astronomy, University of Nigeria, Nsukka 410001, Enugu State, Nigeria)

  • MAAZA MALIK

    (#x2225;UNESCO-UNISA Africa Chair in Nanosciences/Nanotechnology, College of Graduate Studies, University of South Africa, Pretoria, South Africa**Nanosciences African Network (NANOAFNET), iThemba LABS-National Research Foundation, Somerset West, Western Cape Province, South Africa)

Abstract

Gamma irradiation-induced chemical decomposition and related phase transformation from SnO2 nanoparticles (NPs) to SnO have been studied using X-ray diffraction (XRD), Raman spectroscopy, transmission electron microscopy (TEM) and UV–Vis spectroscopy. XRD studies show that the SnO2NPS are crystalline in nature with rutile structure. Crystallinity of the NPs increases with the increase of gamma irradiation doses, which is consistent with the results of TEM. At high gamma irradiation doses, SnO phase appears from SnO2 matrix, which pushes the SnO2 phase toward stoichiometry. The band gap energy has been found in the range of 3.84–3.76eV, larger than the band gap of bulk SnO2. The larger band gap is attributed due to small particle size, which is confirmed by TEM studies. Optical reflectance and band gap decrease with the increase of gamma irradiation doses due to creation of defects. This property of SnO2 NPs makes it suitable for use in optical devices.

Suggested Citation

  • Ishaq Ahmad & Abdul Faheem Khan & Attaullah Shah & Hina Tabassum & Abdulla Diallo & Javed Iqbal & F. I. Ezema & Maaza Malik, 2019. "GAMMA IRRADIATION-INDUCED CHEMICAL DECOMPOSITION-RELATED BANDGAP ENGINEERING IN SnO2 NANOPARTICLES," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 26(07), pages 1-8, August.
    • Handle: RePEc:wsi:srlxxx:v:26:y:2019:i:07:n:s0218625x18502281
    DOI: 10.1142/S0218625X18502281
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