Nanoporous titania was obtained by anodic oxidation of magnetron deposited aluminum–titanium alloy films with subsequent alumina etching. This method has the merit of low temperature operation. The porosity of the titania film obtained can be controlled by the titanium concentration in the alloy. These nanoporous titania layers consist of vertical pores. They can provide anisotropic light scattering in a fabricated electrochromic cell. The vertical pore structure with high layer porosity yields a diffuse reflectance in the electrochromic cell of about 60%.
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Lazarouk et al. (2007) studied this question.
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