Microporous TiO 2 films were fabricated using a two-step replicating process, in which porous anodic alumina was used as a template. The TiO 2 films prepared from a TiO 2 sol solution had straight micropores of high aspect ratio, and the distribution of the pore diameter was very sharp. Change due to postheating treatment of as-prepared TiO 2 films was examined by electron diffraction analysis and scanning electron microscopic observation.
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Masuda et al. (1992) studied this question.
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