Journal
NANOTECHNOLOGY
Volume 20, Issue 5, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/20/5/055709
Keywords
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Funding
- National Science Fund for Distinguished Young Scholars [50625204]
- Science Fund for Creative Research Groups [50621201]
- National Natural Science Foundation of China [50472006]
- Ministry of Sciences and Technology of China [2009CB623301]
- 863-program [2006AA03Z0428]
- Samsung Electro-Mechanics Co., Ltd.
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High aspect ratio BaTiO3 nanotube arrays with single crystal structure were fabricated by the hydrothermal method at low temperature (150 degrees C). Numerous structure study methods, including x-ray diffraction (XRD), Raman spectroscopy, transmission electron microscopy (TEM), electron paramagnetic resonance (EPR), and x-ray photoelectron spectroscopy (XPS), were used to investigate the structure of single crystal BaTiO3 nanotube arrays. TEM observation shows that BaTiO3 nanotubes have identical crystallographic orientation through their growth directions. EPR and XPS studies show that the obtained BaTiO3 nanotubes contain perceptible oxygen vacancies. Those oxygen vacancies are responsible for the observed green emission band at 545 nm (2.27 eV) detected by photoluminescence study.
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