Journal
JOURNAL OF CRYSTAL GROWTH
Volume 311, Issue 20, Pages 4495-4498Publisher
ELSEVIER
DOI: 10.1016/j.jcrysgro.2009.08.019
Keywords
Sol-gel template method; Nanotube; Ferroelectric materials
Funding
- National Natural Science Foundation of China [10802072, 50702048, 50772093]
- Hunan Provincial Natural Science Foundation of China [09JJ1006]
- Program for New Century Excellent Talents in University [NCET-08-0687]
- Doctoral Program of Higher Education [200805301020, 20070530010]
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Nd-substituted bismuth titanate (B3.15Nd0.85Ti3O12, BNT) nanotube arrays are fabricated by means of a sol-gel method utilizing porous anodic aluminum oxide (AAO) template. The morphologies and structures have been determined by scanning electron microscopy (SEM), X-ray diffraction (XRD) and transmission electron microscopy (TEM). The diameter and length of these nanotubes are about 200 nm and 60 mu m, respectively, and their wall thickness is about 30 nm. The average grain size is around 40 nm. XRD data show that the BNT nanotubes possess bismuth-layered perovskite structure. High-resolution electron microscopy (HRTEM) image demonstrates that the BNT nanotubes are polycrystalline. Polarization-electric field (P-E) response curves of BNT nanotube arrays were measured, and a size induced polarization reduction phenomenon is observed. (C) 2009 Elsevier B.V. All rights reserved.
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