Field emission from TiO2/Ti nanotube arrays with different morphologies
Field emission from TiO2/Ti nanotube arrays with different morphologies
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DOI：
10.1016/j.physb.2010.08.060
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发表时间：
2010-11
影响因子：
2.8
通讯作者：
Ruisheng Guo;Chengwei Wang;Jianbiao Chen;Jian Wang;Ling-Qing Wang;Wei-min Liu
中科院分区：
文献类型：
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作者：
Ruisheng Guo;Chengwei Wang;Jianbiao Chen;Jian Wang;Ling-Qing Wang;Wei-min Liu
在HF溶液中，采用电化学方法制备了不同阳极氧化时间的TiO 2/Ti纳米管阵列。场发射扫描电子显微镜（FE-SEM）图像显示阳极氧化时间对TiO 2/Ti纳米管阵列的形貌有很大影响。通过X射线光电子能谱（XPS）分析所得纳米管的组成。采用Fowler-Nordheim（FN）理论研究了不同形貌样品的场发射特性。结果表明，形貌对场发射性能有影响。TiO 2/Ti纳米管阵列具有清晰、均匀、短的纳米管，显示出适中的场发射性能，具有较好的开启电场（4.6 V/μm）和较好的场发射稳定性。
Well-aligned TiO2/Ti nanotube arrays were electrochemically formed in a HF solution for different anodization times. Field emission scanning electron microscopy (FE-SEM) images reveal that anodization time had a great influence on the morphology of TiO2/Ti nanotube arrays. The composition of resulting nanotubes was analyzed by X-ray photoelectron spectroscopy (XPS). Field emission properties of the prepared samples with different morphologies were investigated by the Fowler-Nordheim (FN) theory. The results indicate that the morphology can affect field emission behaviors. TiO2/Ti nanotube arrays with clear, uniform, and short nanotubes display moderate field emission properties, and have the better turn-on field of 4.6 V/μm and good field emission stability.