Hydrothermal Synthesis of Thin Films of Barium Titanate Ceramic Nano-Tubes at 200°C |
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Authors: | Nitin P Padture Xuezheng Wei |
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Affiliation: | Department of Metallurgy and Materials Engineering, Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269-3136 |
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Abstract: | A novel, low-temperature synthesis method for producing BaTiO3 thin films patterned in the form of nano-tubes ("honeycomb") on Ti substrates is reported. In this two-step method, the Ti substrate is first anodized to produce a surface layer (∼200–300-nm thickness) of amorphous titanium oxide nano-tube (∼100-nm diameter) arrays. In the second step, the anodized substrate is subjected to hydrothermal treatment in aqueous Ba(OH)2, where the nano-tube arrays serve as templates for their hydrothermal conversion to polycrystalline BaTiO3 nano-tubes. This opens the possibility of tailoring the nano-tube arrays and of using various precursor solutions and their combinations in the hydrothermal bath, to produce ordered, patterned thin-film structures of various Ti-containing ceramics. These could find use not only in a variety of electronic device applications but also in biomedical applications, where patterned thin films are also desirable. |
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Keywords: | synthesis thin films barium titanate |
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