Monte Carlo study for the growth of α-Fe2O3 nanowires synthesized by thermal oxidation of iron

被引：21

作者：

Dong, Zhao ^{[1
]}

Kashkarov, Pavel ^{[2
]}

Zhang, Han ^{[1
]}

机构：

[1] Peking Univ, Dept Phys, State Key Lab Mesoscope Phys, Phys Mat Lab, Beijing 100871, Peoples R China

[2] Moscow MV Lomonosov State Univ, Fac Phys, Moscow 119899, Russia

来源：

NANOSCALE | 2010年 / 2卷 / 04期

基金：

中国国家自然科学基金;

关键词：

FIELD-EMISSION PROPERTIES; METAL-OXIDE NANOWIRES; FE2O3; NANOWIRES; ARRAYS; NANOBELTS;

D O I：

10.1039/b9nr00188c

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The growing mechanism of alpha-Fe2O3 nanowires synthesized by thermal oxidation of iron is studied by the Monte Carlo method. Using a model of diffusion, the effects of synthesizing temperature, oxygen density and annealing on the morphology of the nanowires have been simulated. The results show that nanowires with a large head can only be obtained under the correct temperature and a sufficiently high density of oxygen. Under a low temperature or a low density of oxygen, particles can be obtained. And under a high temperature or after annealing, the nanowires will become thicker. The results are consistent with our experiments. This fact indicates that the growth of alpha-Fe2O3 nanowires should be a diffusion process and provides an approach for improving the quality of the nanowires.

引用

页码：524 / 528

页数：5

共 15 条

[1] Metal oxide nanowires: Preparation and application in gas sensing [J].

Comini, Elisabetta ;

Faglia, Guido ;

Ferroni, Matteo ;

Ponzoni, Andrea ;

Vomiero, Alberto ;

Sberveglieri, Giorgio .

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2009, 305 (1-2) :170-177

[2] Spontaneous Growth of Superstructure α-Fe2O3 Nanowire and Nanobelt Arrays in Reactive Oxygen Plasma [J].

Cvelbar, Uros ;

Chen, Zhiqiang ;

Sunkara, Mahendra K. ;

Mozetic, Miran .

SMALL, 2008, 4 (10) :1610-1614

[3]

Dong Z, 2007, J PHYS CHEM C, V111, P18475, DOI [10.1021/jp075365l, 10.1021/jp0753651]

[4] Synthesis of large arrays of aligned α-Fe2O3 nanowires [J].

Fu, YY ;

Wang, RM ;

Xu, J ;

Chen, J ;

Yan, Y ;

Narlikar, A ;

Zhang, H .

CHEMICAL PHYSICS LETTERS, 2003, 379 (3-4) :373-379

[5] Synthesis of Fe2O3 nanowires by oxidation of iron [J].

Fu, YY ;

Chen, J ;

Zhang, H .

CHEMICAL PHYSICS LETTERS, 2001, 350 (5-6) :491-494

[6] Defects and growing mechanisms of α-Fe2O3 nanowires [J].

Han, Q. ;

Xu, Y. Y. ;

Fu, Y. Y. ;

Zhang, H. ;

Wang, R. M. ;

Wang, T. M. ;

Chen, Z. Y. .

CHEMICAL PHYSICS LETTERS, 2006, 431 (1-3) :100-103

[7] Synthesis, electrical measurement, and field emission properties of α-Fe2O3 nanowires [J].

Hsu, Li-Chieh ;

Li, Yuan-Yao ;

Hsiao, Chun-Yen .

NANOSCALE RESEARCH LETTERS, 2008, 3 (09) :330-337

[8]

LANDAU DP, 2008, GUIDE MONTE CARLO SI, P127

[9] A novel method for metal oxide nanowire synthesis [J].

Rackauskas, Simas ;

Nasibulin, Albert G. ;

Jiang, Hua ;

Tian, Ying ;

Kleshch, Victor I. ;

Sainio, Jani ;

Obraztsova, Elena D. ;

Bokova, Sofia N. ;

Obraztsov, Alexander N. ;

Kauppinen, Esko I. .

NANOTECHNOLOGY, 2009, 20 (16)

[10] Devices and chemical sensing applications of metal oxide nanowires [J].

Shen, Guozhen ;

Chen, Po-Chiang ;

Ryu, Koungmin ;

Zhou, Chongwu .

JOURNAL OF MATERIALS CHEMISTRY, 2009, 19 (07) :828-839

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