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Structure study of single crystal BaTiO3 nanotube arrays produced by the hydrothermal method

机译:水热法制备单晶BaTiO3纳米管阵列的结构研究

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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.
机译:通过水热法在低温(150℃)下制备了具有长宽比的具有单晶结构的BaTiO 3纳米管阵列。用于研究单晶结构的方法很多,包括X射线衍射(XRD),拉曼光谱,透射电子显微镜(TEM),电子顺磁共振(EPR)和X射线光电子能谱(XPS)。 BaTiO3纳米管阵列。 TEM观察表明,BaTiO3纳米管在其生长方向上具有相同的晶体学取向。 EPR和XPS研究表明,所获得的BaTiO3纳米管含有可察觉的氧空位。这些氧空位是由光致发光研究检测到的在545 nm(2.27 eV)处观察到的绿色发射带的原因。

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