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Chin. Phys. B, 2009, Vol. 18(9): 3922-3927    DOI: 10.1088/1674-1056/18/9/051
CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES Prev   Next  

Synthesis and characterization of highly-ordered barium-strontium titanate nanotube arrays fabricated by sol—gel method

Chen Yu(陈煜)a)b), Chen Wei(程伟)a), Guo Feng(郭峰)a), Li Mei-Ya(李美亚)a), Liu Wei(刘威)a)b)†, and Zhao Xing-Zhong(赵兴中)a)b)‡
a Department of Physics, Wuhan University, Wuhan 430072, China; b Nanoscience and Nanotechnology Center, Wuhan University, Wuhan 430072, China
Abstract  Highly uniformed barium-strontium titanate nanotube arrays were fabricated using a porous anodic aluminum oxide template from a barium-strontium titanate sol--gel solution. Electron microscope results showed that nanotubes with uniform length and diameter were obtained. The diameters and lengths of these nanotubes were dependent on the pore diameter and the thickness of the applied anodic aluminum oxide template. High resolution transmission electron microscopy and the selected-area electron diffraction pattern investigations demonstrated the perovskite structure and the polycrystalline of the fabricated barium-strontium titanate nanotubes. The characterization of the electrical and dielectric properties had also been made. Compared to thin film material, the intrinsic leakage current density is almost the same. Besides, at 30 ℃, the dielectric constant and dielectric loss of the fabricated nanotube is 80 and 0.027 at 1 MHz respectively.
Keywords:  nanotubes      barium-strontium titanate      sol--gel  
Received:  03 March 2009      Revised:  21 April 2009      Accepted manuscript online: 
PACS:  81.07.De (Nanotubes)  
  73.63.Fg (Nanotubes)  
  77.22.Ch (Permittivity (dielectric function))  
  77.22.Gm (Dielectric loss and relaxation)  
  81.16.-c (Methods of micro- and nanofabrication and processing)  
  81.20.Fw (Sol-gel processing, precipitation)  
Fund: Project is supported by the National Natural Science Foundation of China (Grant No 60244003).

Cite this article: 

Chen Yu(陈煜), Chen Wei(程伟), Guo Feng(郭峰), Li Mei-Ya(李美亚), Liu Wei(刘威), and Zhao Xing-Zhong(赵兴中) Synthesis and characterization of highly-ordered barium-strontium titanate nanotube arrays fabricated by sol—gel method 2009 Chin. Phys. B 18 3922

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