Synthesis of mesoscopic barium titanate single crystals incorporating a cuboid-shaped hollow core

Mesoscopic barium titanate (BaTiO 3) single crystals with dimensions of 10–15 nm that incorporated a cuboid-shaped hollow core were synthesized by a sol–gel method using a highly-concentrated Ba–Ti alkoxide precursor solution combined with a surfactant templating approach. In this synthesis route, p...

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Bibliographic Details
Published in:Journal of crystal growth 2005-02, Vol.275 (1), p.e2377-e2381
Main Authors: Shimooka, Hirokazu, Tanizaki, Takumi, Mitome, Masanori, Bando, Yoshio, Kohiki, Shigemi
Format: Article
Language:English
Subjects:
Al. Nanostructure
B2. Dielectric materials
Bl. Perovskites
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Summary:Mesoscopic barium titanate (BaTiO 3) single crystals with dimensions of 10–15 nm that incorporated a cuboid-shaped hollow core were synthesized by a sol–gel method using a highly-concentrated Ba–Ti alkoxide precursor solution combined with a surfactant templating approach. In this synthesis route, perovskite BaTiO 3 nanocrystals were formed directly by a polycondensation reaction of the gel framework during aging at room temperature. Hollow-core nanocrystals were contained in the product, which was obtained by firing the crystalline gel at 500 °C in flowing oxygen. The cuboid-shaped hollow cores of the nanocrystals were about 0.2 nm in size and had {1 0 0} inner surfaces. In addition, it was also found that some kind of ordered structure was formed on a mesoscale with an interplaner spacing of 14 nm before and after firing at 500 °C.
ISSN:0022-0248
1873-5002
DOI:10.1016/j.jcrysgro.2004.11.342