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Growth of single-crystalline tungsten nanowires by an alloy-catalyzed method at 850 °C

Published online by Cambridge University Press:  31 January 2011

Shiliang Wang
Affiliation:
State Key Laboratory for Powder Metallurgy, and School of Physics Science and Technology, Central South University, Changsha 410083, People’s Republic of China
Yuehui He*
Affiliation:
State Key Laboratory for Powder Metallurgy, and School of Physics Science and Technology, Central South University, Changsha 410083, People’s Republic of China
Jian Xu
Affiliation:
State Key Laboratory for Powder Metallurgy, and School of Physics Science and Technology, Central South University, Changsha 410083, People’s Republic of China
Yao Jiang
Affiliation:
State Key Laboratory for Powder Metallurgy, and School of Physics Science and Technology, Central South University, Changsha 410083, People’s Republic of China
Baiyun Huang
Affiliation:
State Key Laboratory for Powder Metallurgy, and School of Physics Science and Technology, Central South University, Changsha 410083, People’s Republic of China
Jin Zou*
Affiliation:
School of Engineering, and Centre for Microscopy and Microanalysis, The University of Queensland, St. Lucia, Queensland 4072, Australia
Yong Wang
Affiliation:
School of Engineering, and Centre for Microscopy and Microanalysis, The University of Queensland, St. Lucia, Queensland 4072, Australia
C.T. Liu
Affiliation:
Materials Science and Engineering Department, The University of Tennessee, Knoxville, Tennessee 37886-2200
P.K. Liaw
Affiliation:
Materials Science and Engineering Department, The University of Tennessee, Knoxville, Tennessee 37886-2200
*
a)Address all correspondence to these authors. e-mail: [email protected]
b)Address all correspondence to these authors. e-mail: [email protected]
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Abstract

In this study, we report the growth of metallic tungsten nanowires induced by alloy catalysts (Fe–Ni) at a temperature of 850 °C. The synthesized tungsten nanowires have bottom diameters of 100 to 400 nm and tip diameters of <80 nm, and show a well-defined single-crystalline structure. The formation of the (Fe,Ni)-catalyzed W nanowires should be controlled by the vapor–solid–solid mechanism, rather than the traditional vapor–liquid–solid mechanism, because the growth temperature is significantly below the lowest eutectic temperature (1455 °C) of the Fe–Ni–W ternary system. Our study demonstrates the feasibility of synthesizing metallic nanowires via metal-catalyzed methods, which may be extended to the synthesis of some other metallic nanowires.

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Copyright
Copyright © Materials Research Society 2008

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References

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