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Raman Spectroscopic Investigations of Nanoparticles of SnxTi1−xO2 Solid Solution

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SnO2 nanoparticles dispersed in TiO2 matrix are prepared at a relatively low temperature of ∼185 °C. Nanoparticles of SnxTi1−xO2 solid solution without significant aggregation have been prepared by annealing them at ∼500 and 900 °C. X-ray diffraction and high-resolution transmission electron microscopy studies have clearly established the nano-size nature of the samples. Raman spectroscopic investigations of these samples show mixed vibrational modes, some of them being similar to TiO2 (A1g, Eg), while some of them are similar to SnO2 (B2g). The Eg mode shows significant red shift and B2g mode shows significant blue shift. Unlike this A1g mode remains unaffected. These results are explained based on the combined effects of random alloy formation and the nano-size nature of samples.
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Document Type: Research Article

Publication date: 2008-08-01

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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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