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Microstructural and Photoluminescence Properties of Tin Dioxide Modified by Electron Beam Irradiation

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Abstract:

A modified technique was developed by electron beam irradiation to prepare tin dioxide (SnO2) nanocrystals using the sol–gel method. SnO2 nanoparticles were radiated under a 1,400 KGy dose. The morphology and microstructure of the SnO2 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 SnO2 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 SnO2 nanocrystals after irradiation. The Raman spectrum shows that there are new peaks at 535 cm−1 and 691 cm−1. The optical properties of SnO2 nanoparticles were characterized by ultraviolet-visible (UV-vis) and photoluminescence spectrophotometers. The band gap energy of the irradiated SnO2 was 3.29 eV smaller than that of the unirradiated SnO2 due to size effects and some defects of SnO2 nanocrystals. This work provides a novel approach for the improvement of SnO2 nanocrystals. The optical properties of the irradiated SnO2 nanomaterials are also expected to improve.

Keywords: ELECTRON BEAM IRRADIATION; MICROSTRUCTURE; PHOTOLUMINESCENCE; SNO2 NANOCRYSTALS

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2011.5293

Publication date: November 1, 2011

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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