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- W2005746385 abstract "SnO2:2 at. %Er xerogel samples were obtained by sol-gel technique from colloidal suspensions with distinct pHs. The evaluation of critical regions inside the nanocrystallite is fundamental for the interpretation of the influence of pH on the emission data. In this way, the nanocrystal depletion layer thickness was obtained with the help of photoluminescence, Raman, X-ray diffraction, and field-emission gun scanning electron microscopy measurements. It was observed that acid suspensions (pH < 7) lead to high surface disorder in which a larger number of cross-linked bonds Sn-O-Sn among nanoparticles are present. For these samples, the nanoparticle depletion layer is larger as compared to samples obtained from other pH. Photoluminescence measurement in the near infrared region indicates that the emission intensity of the transition 4I13/2 → 4I15/2 is also influenced by the pH of the starting colloidal suspension, generating peaks more or less broadened, depending on location of Er3+ ions in the SnO2 lattice (high or low symmetry sites)." @default.
- W2005746385 created "2016-06-24" @default.
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- W2005746385 date "2013-08-26" @default.
- W2005746385 modified "2023-10-16" @default.
- W2005746385 title "Nanoparticle characterization of Er-doped SnO<sub>2</sub> pellets obtained with different pH of colloidal suspension" @default.
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- W2005746385 doi "https://doi.org/10.1063/1.4819089" @default.
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