Single crystal TiO2 nanorods: Large-scale synthesis and field emission |
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| Authors: | Cheng-Wei Wang Jian-Biao ChenLin-Qing Wang You-Min KangDong-Sheng Li Feng Zhou |
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| Affiliation: | a Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou, 730070, Chinab State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou, 730000, China |
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| Abstract: | 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/μm to 2.98, and 2.16 V/μm as the growth temperature increases from 700 °C to 750, and 800 °C, respectively. In addition, the nanorods show good FE stability during 480 min. 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. |
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| Keywords: | Titanium dioxide Nanorods Field emission Chemical vapor deposition Microstructure |
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