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

被引：114

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

共 36 条

[11] ANOMALY IN THE OXIDATION RATE OF MAGNETITE AT ITS CURIE-TEMPERATURE [J].

GALLAGHER, PK ;

GYORGY, EM ;

BAIR, HE .

JOURNAL OF CHEMICAL PHYSICS, 1979, 71 (02) :830-835

[12]

GARDNER RFG, 1963, J PHYS CHEM SOLIDS, V24, P1193

[13] An n- to p-type conductivity transition induced by oxygen adsorption on α-Fe2O3 [J].

Gurlo, A ;

Bârsan, N ;

Oprea, A ;

Sahm, M ;

Sahm, T ;

Weimar, U .

APPLIED PHYSICS LETTERS, 2004, 85 (12) :2280-2282

[14] Surface oxidation state of combustion-synthesized γ-Fe2O3 nanoparticles determined by electron energy loss spectroscopy in the transmission electron microscope [J].

Jasinski, J ;

Pinkerton, KE ;

Kennedy, IM ;

Leppert, VJ .

SENSORS AND ACTUATORS B-CHEMICAL, 2005, 109 (01) :19-23

[15]

Kind H, 2002, ADV MATER, V14, P158, DOI 10.1002/1521-4095(20020116)14:2<158::AID-ADMA158>3.0.CO

[16]

2-W

[17] DONOR LEVELS IN ALPHA-FE2O3 [J].

KOBAYASHI, K ;

OKADA, G ;

KUMANOTANI, J .

JOURNAL OF MATERIALS SCIENCE LETTERS, 1988, 7 (08) :853-854

[18] Acceptor-like behavior of reducing gases on the surface of n-type In2O3 [J].

Korotcenkov, G ;

Brinzari, V ;

Golovanov, V ;

Cerneavschi, A ;

Matolin, V ;

Tadd, A .

APPLIED SURFACE SCIENCE, 2004, 227 (1-4) :122-131

[19] ELECTRON-ENERGY-LOSS NEAR-EDGE STRUCTURES IN THE OXYGEN K-EDGE SPECTRA OF TRANSITION-METAL OXIDES [J].

KURATA, H ;

LEFEVRE, E ;

COLLIEX, C ;

BRYDSON, R .

PHYSICAL REVIEW B, 1993, 47 (20) :13763-13768

[20] ZnO nanobelt/nanowire Schottky diodes formed by dielectrophoresis alignment across Au electrodes [J].

Lao, CS ;

Liu, J ;

Gao, PX ;

Zhang, LY ;

Davidovic, D ;

Tummala, R ;

Wang, ZL .

NANO LETTERS, 2006, 6 (02) :263-266

← 1 2 3 4 →