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

Ishaq Ahmad, Abdul Faheem Khan, Attaullah Shah, Hina Tabassum, Abdulla Diallo, Javed Iqbal, F. I. Ezema and Maaza Malik
Additional contact information
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

Surface Review and Letters (SRL), 2019, vol. 26, issue 07, 1-8

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.

Keywords: SnO2NPs; gamma irradiation; chemical decomposition; bandgap engineering; Raman spectroscopy (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://www.worldscientific.com/doi/abs/10.1142/S0218625X18502281
Access to full text is restricted to subscribers

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:wsi:srlxxx:v:26:y:2019:i:07:n:s0218625x18502281

Ordering information: This journal article can be ordered from

DOI: 10.1142/S0218625X18502281

Access Statistics for this article

Surface Review and Letters (SRL) is currently edited by S Y Tong

More articles in Surface Review and Letters (SRL) from World Scientific Publishing Co. Pte. Ltd.
Bibliographic data for series maintained by Tai Tone Lim ().