Single crystal TiO2 nanorods: Large-scale synthesis and field emission
Single crystal TiO2 nanorods: Large-scale synthesis and field emission
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单晶 TiO2 纳米棒：大规模合成和场致发射
DOI：
10.1016/j.tsf.2012.03.039
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发表时间：
2012-05-31
期刊：
影响因子：
2.1
通讯作者：
Zhou, Feng
中科院分区：
文献类型：
--
作者：
Wang, Cheng-Wei;Chen, Jian-Biao;Zhou, Feng
开发了一种简便的低压化学气相沉积方法，在镀镍钛衬底上制备了单晶的二氧化钛纳米棒。结果表明，所制备的纳米棒为[110]择优取向的高纯度单晶。直接使用纳米棒作为发射体，研究了它们的场发射特性。随着生长温度从700℃升高到750℃和800℃，纳米棒的开启电场分别从3.96V/mum下降到2.98和2.16V/mum。此外，纳米棒在480 mm范围内表现出良好的FE稳定性。这种行为主要与纳米棒的形貌有关，而纳米棒的形貌依赖于生长温度。根据实验结果，对纳米棒的生长机理进行了详细的分析。(C)2012爱思唯尔B.V.保留所有权利。
A facile growth procedure of low-pressure chemical vapor deposition has been developed to synthesize single crystal TiO2 nanorods on Ni-coated Ti substrate. The results indicate that the as-prepared nanorods are high purity single crystal with a [110] preferential orientation. Using directly the nanorods as emitters, their field emission (FE) properties have been investigated. The turn-on field of the nanorods decreases from 3.96 V/mu m to 2.98, and 2.16 V/mu m as the growth temperature increases from 700 degrees C to 750, and 800 degrees C, respectively. In addition, the nanorods show good FE stability during 480 mm. Such behavior is mainly related to the morphology of nanorods, which depends on the growth temperature. Also, the growth mechanisms of the nanorods are analyzed in detail based on the experimental results. (C) 2012 Elsevier B.V. All rights reserved.