Reflection-enhancing coatings from layer-by-layer self-assembled polyelectrolyte/colloidal TiO2 multilayers

Haihu Yu; Desheng Jiang; Xiaofu Li; Dingshan Yu; Lingde Zhou

doi:10.1117/12.574511

20 January 2005 Reflection-enhancing coatings from layer-by-layer self-assembled polyelectrolyte/colloidal TiO₂ multilayers

Haihu Yu, Desheng Jiang, Xiaofu Li, Dingshan Yu, Lingde Zhou

Author Affiliations +

Proceedings Volume 5633, Advanced Materials and Devices for Sensing and Imaging II; (2005) https://doi.org/10.1117/12.574511
Event: Photonics Asia, 2004, Beijing, China

Abstract

Colloidal TiO₂ was prepared by hydrolyzing tetra-n-butyl titauate. Composite multilayer films of Poly(sodium 4-styrensulfonate), PSS, and colloidal TiO₂ particles were electrostatically self-assembled onto optic fibers and microscope glass slides. As the PSS/TiO₂ film was deposited onto the end face of a glass fiber, the reflected optic intensity periodically oscillated as the bilayer number of the film increased. After a 24-bilayer film was coated onto the both sides of a glass slide, the transmittance at 850 nm decreased more than 20%, which means that the film could serve the function as a reflection-enhancing coating. Data of X-ray diffraction and TEM electron diffraction analysis show that the main crystalline phase of the colloidal TiO₂ particles is brookite and that the PSS/TiO₂ films are polycrystalline films. Scratching experiments indicate that the composite films are of relatively high hardness.

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Haihu Yu, Desheng Jiang, Xiaofu Li, Dingshan Yu, and Lingde Zhou "Reflection-enhancing coatings from layer-by-layer self-assembled polyelectrolyte/colloidal TiO₂ multilayers", Proc. SPIE 5633, Advanced Materials and Devices for Sensing and Imaging II, (20 January 2005); https://doi.org/10.1117/12.574511

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KEYWORDS

Thin films

Glasses

Composites

Particles

Transmittance

Microscopes

Multilayers

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