Aligned rutile TiO2 nanorods: Facile synthesis and field emission

被引：11
作者：
Li, Dong-Sheng [1 ]
Chen, Jian-Biao [1 ]
Wang, Cheng-Wei [1 ,2 ]
Zhu, Wei-Dong [1 ]
Zhang, Ling [1 ]
Li, Yan [1 ]
Wang, Jian [1 ]
Zhou, Feng [2 ]
机构：
[1] Northwest Normal Univ, Coll Phys & Elect Engn, Key Lab Atom & Mol Phys & Funct Mat Gansu Prov, Lanzhou 730070, Peoples R China
[2] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China
来源：
SUPERLATTICES AND MICROSTRUCTURES | 2013年 / 59卷
基金：
中国国家自然科学基金;
关键词：
TiO2; nanorods; Field emission; Chemical vapor deposition; LARGE-SCALE SYNTHESIS; NANOWIRES; ARRAYS; ENHANCEMENT; DEPOSITION; ANATASE; GROWTH; FILMS;
D O I：
10.1016/j.spmi.2013.04.010
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
By simple two-step technique, first anodization in an ethylene glycol solution and then oxidation in a low-pressure atmosphere by chemical vapor deposition at 750 degrees C, aligned rutile TiO2 nanorods (TNRs) were successfully synthesized. Furthermore, their growth mechanism and field-emission (FE) property were experimentally investigated. The results indicate that the aligned TNRs are rutile phase with a preferential growth direction of [110] and their structure parameters such as the aspect ratio and density can be easily adjusted by the anodization times, which are beneficial for optimizing their FE properties. When the anodization time increases from 30 to 480 s, the nanorods show various aspect ratios in a range of 16-28 and different turn-on fields within 1.78-6.46 V/mu m. The optimized sample of anodized 120s exhibits excellent FE properties involving both a low turn-on field of 1.78 V/mu m, a high field enhancement factor (4757) and a good FE stability. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：187 / 195
页数：9
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