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

页码：1356 / 1361

页数：6

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