Synthesis of iron oxide nanoneedles and their field emission properties

被引：16
|
作者：
Sun, Xiaohuan [1 ,2 ]
Liu, Wentao [3 ]
Ouyang, Dongxun [1 ,2 ]
机构：
[1] Zhengzhou Univ, Sch Phys & Engn, Zhengzhou 450052, Peoples R China
[2] Zhengzhou Univ, Key Lab Mat Phys, Minist Educ, Zhengzhou 450052, Peoples R China
[3] Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450052, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2009年 / 478卷 / 1-2期
关键词：
Nanostructured materials; Oxide materials; Electronic properties; X-ray diffraction; ALPHA-FE2O3; NANOFLAKES; ALIGNED ARRAYS; NANOWIRES; GROWTH; FE3O4;
D O I：
10.1016/j.jallcom.2008.11.152
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this paper, the fabrication of iron oxide (alpha-Fe2O3) nanoneedle arrays has been achieved. By thermally oxidizing iron plates at 650 degrees C under vacuum, nanoneedles with 2-5 mu m in length are obtained with high yield. The diameters of the nanoneedle tips are typically as small as several nanometers. The field emission measurement shows that these nanoneedles have strong electron field emission abilities, with relatively low turn-on fields of 4.8 V mu m(-1). This makes the Fe2O3 nanoneedle arrays one of the promising candidates as the field emitters. (C) 2009 Published by Elsevier B.V.
引用
收藏
页码：38 / 40
页数：3
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