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J Am Chem Soc. 2006 Apr 12;128(14):4544-5.

Formation of highly ordered mesoporous titania films consisting of crystalline nanopillars with inverse mesospace by structural transformation.

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  • 1Department of Applied Chemistry, Graduate School of Science and Engineering, and Kagami Memorial Laboratory for Materials Science and Technology, Waseda University, Ohkubo 3-4-1, Shinjuku-ku, Tokyo 169-8555, Japan.

Abstract

Highly ordered mesoporous titania films consisting of crystalline nanopillars with open-spaced, perpendicular, and continuous porosity have been prepared via structural transformation from a 3D hexagonal mesostructure during the thermal treatment. The mechanism of the structural transformation is explained by the crystallization of the titania framework and the large contraction of the initial 3D hexagonal mesostructured film upon calcination. This structural transformation provides a new approach to generate mesoporous thin-film materials with unique structures.

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