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Patterned polyaniline encapsulated in titania nanotubes for electrochromism

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Abstract

In this article, we report the preparation of a TiO2 nanotube array (TNA) film used as a transparent electrochromic material and a TNA/polyaniline patterned hybrid electrochromic film utilized as an information display material. The TNA film was fabricated by an anodizing process, and a surface patterned TNA with extreme wettability contrast (hydrophilic/hydrophobic) on a TNA surface through self-assembly (SAM) and photocatalytic lithography is fabricated. Then the TNA/polyaniline hybrid film was prepared by electrodeposition of aniline in an aqueous solution. Finally, the electrochromic properties of the TNA film and the TNA/polyaniline hybrid film were investigated. Compared with neat TNA film and polyaniline (PANI) films, the hybrid film shows a much higher optical contrast in the near infrared range. The TNA/polyaniline hybrid film shows higher coloration efficiencies of 24.4 cm2 C−1 at a wavelength of 700 nm and 17.1 cm2 C−1 at a wavelength of 1050 nm compared to the TNA coloration efficiency. The color switching time (20.9 s or 22.9 s) of TNA/polyaniline is faster than TNA.

Graphical abstract: Patterned polyaniline encapsulated in titania nanotubes for electrochromism

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Publication details

The article was received on 11 Nov 2017, accepted on 16 Jan 2018 and first published on 25 Jan 2018


Article type: Paper
DOI: 10.1039/C7CP07617G
Citation: Phys. Chem. Chem. Phys., 2018, Advance Article
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    Patterned polyaniline encapsulated in titania nanotubes for electrochromism

    H. Lv, Y. Wang, L. Pan, L. Zhang, H. Zhang, L. Shang, H. Qu, N. Li, J. Zhao and Y. Li, Phys. Chem. Chem. Phys., 2018, Advance Article , DOI: 10.1039/C7CP07617G

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