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    Title: TiO2 nanoparticles synthesized in an aprotic solvent and applied to prepare high-refractive-index TiO2-polyimide hybrid thin films
    Authors: Chang, Chao-Ching;Hong, Shih-Ya;Cheng, Liao-Ping;Yu, Yang-Yen
    Keywords: TiO2 nanoparticle;Aprotic solvent;Polyimide;Sol–gel;High refractive index;Optical thin film
    Date: 2014-07-01
    Issue Date: 2016-04-22 13:46:47 (UTC+8)
    Publisher: Springer New York LLC
    Abstract: In this study, very small (2–5 nm) TiO2 nanoparticles
    were synthesized in an aprotic solvent, N,Ndimethylacetamide, via hydrolysis and condensation of titanium alkoxide at room temperature. The synthesized TiO2 sol showed 30 days of storage stability and could be used to prepare high-refractive-index TiO2-polyimide hybrid thin films by an ex-situ method that involved a spin coating and multistep baking process. The field emission scanning electron microscope image showed a flat and uniform morphology of the hybrid thin film. TiO2 domains
    were in the nanometer range, thus avoiding light scattering. The refractive index at 633 nm of the hybrid thin film reached 2.05, which suggested potential applications of the film to anti-reflective coatings and optical waveguides.
    Relation: Journal of Sol-Gel Science and Technology 71(1), pp.129-135
    DOI: 10.1007/s10971-014-3335-3
    Appears in Collections:[化學工程與材料工程學系暨研究所] 期刊論文

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