Abstract

Polycrystalline anatase TiO2 films have been successfully deposited on Si(100) substrates at a temperature of 250 °C at growth rates of higher than 10 Å/s by atmospheric chemical vapor deposition with titanium tetraisopropooxide as a precursor and H2O2 vapor as an oxidant. The H2O2 vapor enhances the crystallization of the TiO2 amorphous network in the grown films. We also show that TiO2 film obtained by low-temperature deposition with the H2O2 vapor exhibits a photocatalytic activity for the naturally adsorbed carbon impurity on its surface, indicating the applicability of the present technique to the field of photocatalyst coating. The present technique is also applicable to the deposition of anatase TiO2 films on flexible polyimide tapes.

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