Template-Based Fabrication of SrTiO3 and BaTiO3 Nanotube

被引:51
作者
Chen, Ying-Yu [1 ]
Yu, Bang-Ying [1 ]
Wang, Jung-Hui [1 ]
Cochran, Rebecca E. [1 ]
Shyue, Jing-Jong [1 ,2 ]
机构
[1] Acad Sinica, Res Ctr Appl Sci, Taipei 115, Taiwan
[2] Natl Taiwan Univ, Dept Mat Sci & Engn, Taipei 106, Taiwan
关键词
SELF-ASSEMBLED MONOLAYERS; TITANIUM-VANADIUM OXIDE; METAL NANOHOLE ARRAYS; THIN-FILMS; 2-STEP REPLICATION; DEPOSITION; NANOWIRES; TIO2; NANOSTRUCTURES; NANOMATERIALS;
D O I
10.1021/ic8018887
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
In response to the growing need for metal oxide nanotubes and nanowires for nanoelectronic applications, polycrystalline titanate nanotubes are synthesized in this work at near-ambient conditions without the application of an external electric field or pre-existing solids. Nanotubes of complicated metal oxides including strontium titanate and barium titanate are fabricated inside anodic aluminum oxide (AAO) templates from aqueous solutions using a simple, inexpensive, reproducible, and environmentally friendly procedure. The deposition solution is prepared by dissolving ammonium hexafluorotitanate and strontium nitrate in a boric acid solution at a pH of 2.5. The typical lengths of SrTiO3 nanotubes are 5-30 mu m, with an average diameter of approximately 250 nm, which is defined by the pore diameter of the AAO template. After annealing at 800 degrees C in air, the resulting nanotubes are polycrystalline cubic SrTiO3. The Sr:Ti ratio in the nanotube is controlled by the hydrolysis of TiF62- ions, and the concentration of Sr2+ and stoichiometric SrTiO3 nanotubes can be obtained, As an additional controlling factor, the surface properties of the AAO can be modified by (octadecyl)trichlorosilane. Barium titanate is also prepared in a similar manner with barium nitrate and ammonium hexafluorotitanate as precursors. The polycrystalline cubic BaTiO3 nanotubes are 12-30 mu m long and approximately 250 nm in diameter.
引用
收藏
页码:681 / 686
页数:6
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