p-Type α-Fe2O3 Nanowires and their n-Type Transition in a Reductive Ambient

被引：113
|
作者：
Lee, Yu-Chen [1 ]
Chueh, Yn-Lun
Hsieh, Chin-Hua
Chang, Mu-Tung
Chou, Li-Jen
Wang, Zhong Lin
Lan, Yann-Wen
Chen, Chii-Dong
Kurata, Hiroki
Isoda, Seiji
机构：
[1] Natl Tsing Hua Univ, Dept Mat Sci & Engn, Hsinchu 300, Taiwan
[2] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA
[3] Acad Sinica, Inst Phys, Taipei 115, Taiwan
[4] Kyoto Univ, Inst Chem Res, Kyoto 6110011, Japan
来源：
SMALL | 2007年 / 3卷 / 08期
关键词：
conductivity; iron; nanowires; oxides;
D O I：
10.1002/smll.200700004
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The synthesis and electronic properties of p-type Α-Fe 2O3 nanowires and their n-type transition in a reductive ambient with ordered oxygen vacancies were analyzed. Α-Fe 2O3 was the most stable iron oxide compound material, widely used in photoelectrodes, gas sensing, catalysts, magnetic recording, and in medical fields. SEM and image of Α-Fe2O3 nanowires synthesized on an Fe64Ni36 substrate at 450°C for 10 hours in an Ar ambient of 100 seem was done. A typical TEM image of nanowire with diameter of 18nm was analyzed. The corresponding diffraction pattern confirms the phase of Α-Fe2O3 with a [001] zone axis. The results show that p-type nature of iron oxide nanowire were mainly caused by strong surface adsorption owing to the oxygen vacancies and the large surface to volume ratio.
引用
收藏
页码：1356 / 1361
页数：6
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