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• W2008696816 abstract "Interaction of sulfonate group of the surfactant AOT with SnO 2 nanoparticles before and after heat treatment. ► Synthesis of SnO 2 nanoparticles by AOT/hexane/water microemulsion route. ► Interaction of surfactant AOT with SnO 2 nanoparticles. ► New IR peak at 1448 cm −1 due to SO 4 2 - residue over SnO 2 . ► SnO 2 nanoparticles show green luminescence which is due to oxygen vacancies. SnO 2 · x H 2 O nanoparticles were prepared at room temperature by the microemulsion route. Sodium bis(2-ethylhexyl) sulfosuccinate (AOT) was used as a surfactant to stabilize the nanoparticles. These nanoparticles show green luminescence at 510 nm, which has been assigned to oxygen vacancies. Infrared spectra of samples heated in the temperature range 500–900 °C show bond formation between SnO 2 nanoparticles and SO 4 2 - , which arises from oxidation of SO 3 - present in AOT. This was further supported by X-ray diffraction. Shape transformations of the particles from triangular to spherical and then to rectangular was observed as the heat-treatment temperature was increased, and this is related to the surface energy of particles. An enhancement in emission intensity of Eu 3+ was observed when Eu 3+ ions were doped into the SnO 2 nanoparticles due to significant energy transfer from SnO 2 (or Eu–O) to Eu 3+ through surface-mediated energy transfer as compared to direct excitation of Eu 3+ at 397 nm. Interestingly, these nanoparticles are dispersible in water, and can be incorporated into polymer-based materials such as polyvinyl alcohol to give homogeneous films, giving rise to blue and red emissions." @default.
• W2008696816 created "2016-06-24" @default.
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• W2008696816 date "2010-09-01" @default.
• W2008696816 modified "2023-09-26" @default.
• W2008696816 title "Surface chemistry of surfactant AOT-stabilized SnO2 nanoparticles and effect of temperature" @default.
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• W2008696816 doi "https://doi.org/10.1016/j.jcis.2010.05.037" @default.
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