Abstract
Y 2O 3 nanoparticulate thin films have been prepared using an emulsion liquid membrane (water-in-oil-in-water (W/O/W) emulsion) system, consisting of Span 83 (sorbitan sesquioleate) as a surfactant and VA-10 (2-methyl-2-ethylheptanoic acid) as an extractant (cation carrier). Yttrium ions were extracted from the external water phase and stripped into the internal water phase to make precursor oxalate nanoparticles. Y 2O 3 nanoparticulate thin film was prepared by casting the W/O emulsion, separated from the external phase and containing the Y oxalate nanoparticles, on a Si substrate, followed by calcination in air. Well-arranged thin-layer nanoparticulate film, consisting of Y 2O 3 nanoparticles smaller than 20 nm, was obtained via spin coating of the W/O emulsion. A multilayer nanoparticulate thin film was also fabricated via a simple procedure of repeated coating and subsequent calcination.
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