TiO2 nanoparticles synthesized in an aprotic solvent and applied to prepare high-refractive-index TiO2-polyimide hybrid thin films

In this study, very small (2–5 nm) TiO 2 nanoparticles were synthesized in an aprotic solvent, N , N -dimethylacetamide, via hydrolysis and condensation of titanium alkoxide at room temperature. The synthesized TiO 2 sol showed 30 days of storage stability and could be used to prepare high-refractiv...

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Bibliographic Details
Published in:Journal of sol-gel science and technology 2014-07, Vol.71 (1), p.129-135
Main Authors: Chang, Chao-Ching, Hong, Shih-Ya, Cheng, Liao-Ping, Yu, Yang-Yen
Format: Article
Language:English
Subjects:
Antireflection coatings
Baking
Ceramics
Chemistry
Chemistry and Materials Science
Colloidal gels. Colloidal sols
Colloidal state and disperse state
Composites
Domains
Exact sciences and technology
Field emission microscopy
General and physical chemistry
Glass
Inorganic Chemistry
Light scattering
Materials Science
Morphology
Nanoparticles
Nanotechnology
Natural Materials
Optical and Electronic Materials
Optical waveguides
Original Paper
Physical and chemical studies. Granulometry. Electrokinetic phenomena
Refractivity
Solvents
Spin coating
Storage stability
Synthesis
Thin films
Titanium dioxide
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Summary:In this study, very small (2–5 nm) TiO 2 nanoparticles were synthesized in an aprotic solvent, N , N -dimethylacetamide, via hydrolysis and condensation of titanium alkoxide at room temperature. The synthesized TiO 2 sol showed 30 days of storage stability and could be used to prepare high-refractive-index TiO 2 -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. TiO 2 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.
ISSN:0928-0707
1573-4846
DOI:10.1007/s10971-014-3335-3