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Optical and ESR Studies on SnO2 Nanoparticles Doped with Dy3+ Ions

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Dy-doped SnO2 nanoparticles were prepared by sol–gel technique. X-ray diffraction, high resolution transmission electron microscopy (HRTEM) demonstrate that the as-obtained nanoparticles could be indexed to tetragonal rutile structure and do not show any other impurity peaks. The Dy-doped SnO2 nanoparticles were spherical and are well-dispersed with narrow size distribution. The diameter of the nanoparticles are about 2 nm from the HRTEM analysis. A considerable red shift in the optical absorption edge was observed with increasing of Dy content. The photoluminescence spectroscopy of SnO2:Dy exhibit blue emission with increasing intensity compared to undoped SnO2 nanoparticles. The ESR spectra of Dy-doped SnO2 nanoparticles exhibit single resonance signal with effective value of g = 1.96. The resonance signal is attributed to isolated Dy3+ ions.
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Document Type: Research Article

Publication date: 2010-12-01

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  • ADVANCED SCIENCE LETTERS is an international peer-reviewed journal with a very wide-ranging coverage, consolidates research activities in all areas of (1) Physical Sciences, (2) Biological Sciences, (3) Mathematical Sciences, (4) Engineering, (5) Computer and Information Sciences, and (6) Geosciences to publish original short communications, full research papers and timely brief (mini) reviews with authors photo and biography encompassing the basic and applied research and current developments in educational aspects of these scientific areas.
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