Microstructural and photoluminescence properties of tin dioxide modified by electron beam irradiation

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Juan Du
  • Jian Wang
  • Zheng Jiao
  • Minghong Wu
  • Z. W. Chen

Detail(s)

Original languageEnglish
Pages (from-to)9709-9713
Journal / PublicationJournal of Nanoscience and Nanotechnology
Volume11
Issue number11
Publication statusPublished - 2011

Abstract

A modified technique was developed by electron beam irradiation to prepare tin dioxide (SnO 2)nanocrystals using the sol-gel method. SnO 2 nanoparticles were radiated under a 1,400 KGy dose. The morphology and microstructure of the SnO 2 nanocrystals were investigated by X-ray diffraction, high-resolution transmission electron microscopy (HRTEM), and Raman spectroscopy. The results indicate that the irradiated SnO2 nanoparticles have better crystallinity than unirradiated SnO 2 nanoparticles, and the resulting nanocrystals have a tetragonal rutile crystalline structure. The HRTEM image proves that the average grain size is about 4 nm, and the clear lattice fringes indicate the improvement of SnO 2 nanocrystals after irradiation. The Raman spectrum shows that there are new peaks at 535 cm ?1 and 691 cm ?1. The optical properties of SnO 2 nanoparticles were characterized by ultraviolet-visible (UV-vis) and photoluminescence spectrophotometers. The band gap energy of the irradiated SnO 2 was 3.29 eV smaller than that of the unirradiated SnO 2 due to size effects and some defects of SnO 2 nanocrystals. This work provides a novel approach for the improvement of SnO 2 nanocrystals. The optical properties of the irradiated SnO 2 nanomaterials are also expected to improve. © 2011 American Scientific Publishers. All rights reserved.

Research Area(s)

  • Electron Beam Irradiation, Microstructure, Photoluminescence, SnO 2 Nanocrystals

Citation Format(s)

Microstructural and photoluminescence properties of tin dioxide modified by electron beam irradiation. / Du, Juan; Wang, Jian; Jiao, Zheng; Wu, Minghong; Shek, C. H.; Wu, C. M L; Lai, J. K L; Chen, Z. W.

In: Journal of Nanoscience and Nanotechnology, Vol. 11, No. 11, 2011, p. 9709-9713.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review