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Channel: ScienceDirect Publication: Thin Solid Films
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Preparation of titanium dioxide thin films by indirect-electrodeposition

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Publication date: 30 April 2017
Source:Thin Solid Films, Volume 628
Author(s): Masaya Chigane, Tsutomu Shinagawa, Jun-ichi Tani
Titanium oxide films were prepared on a quartz glass substrate by the cathodic galvanostatic electrolysis of a solution of titanium bis(ammonium lactato)dihydroxide and ammonium nitrate at 323K using a stainless steel electrode as a “dummy electrode” located in the vicinity (within ~1mm) of the substrate. This novel film preparation method, named “indirect-electrodeposition” is effective for nonconductive substrates without catalysts or reducing agents. During indirect electrodeposition, the films are deposited on the area of the substrate above the electrolyte solution surface. The deposited film was identified as TiO2 by X-ray photoelectron spectroscopy. The amorphous as-deposited film was converted to the anatase-type crystalline TiO2 phase by calcination at 723K. Optical bandgap of the film was evaluated with Kubelka-Munk function from diffuse reflection spectra.


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