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Vol. 2 No. 2 (2010)

Preparation and growth mechanism of nickel nanowires under applied magnetic field

https://doi.org/10.1007/BF03353631
J. Wang
National Key Laboratory of Nano/Micro Fabrication Technology, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Institute of Micro and Nano Science and Technology, Shanghai Jiao Tong University, Shanghai 200240, China
L. Y. Zhang
National Key Laboratory of Nano/Micro Fabrication Technology, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Institute of Micro and Nano Science and Technology, Shanghai Jiao Tong University, Shanghai 200240, China
P. Liu
Zhongyuan University of Technology, Zhengzhou City, Henan Province 450007, China
T. M. Lan
School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
J. Zhang
School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
L. M. Wei
National Key Laboratory of Nano/Micro Fabrication Technology, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Institute of Micro and Nano Science and Technology, Shanghai Jiao Tong University, Shanghai 200240, China
Eric Siu-Wai Kong
National Key Laboratory of Nano/Micro Fabrication Technology, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Institute of Micro and Nano Science and Technology, Shanghai Jiao Tong University, Shanghai 200240, China
C. H. Jiang
School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Y. F. Zhang
National Key Laboratory of Nano/Micro Fabrication Technology, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Institute of Micro and Nano Science and Technology, Shanghai Jiao Tong University, Shanghai 200240, China

Corresponding Author: Y. F. Zhang

yfzhang@sjtu.edu.cn

Nano-Micro Letters, Vol. 2 No. 2 (2010), Article Number: 134-138

Abstract

Nickel nanowires with large aspect ratio of up to 300 have been prepared by a hydrazine hydrate reduction method under applied magnetic field. The diameter of nickel nanowires is about 200 nm and length up to 60 μm. The role of magnetic field on the growth of magnetic nanowires is discussed and a magnetic nanowire growth mechanism has been proposed. Nickel ions are firstly reduced to nickel atoms by hydrazine hydrates in a strong alkaline solution and grow into tiny spherical nanoparticles. Then, these magnetic particles will align under a magnetic force and form linear chains. Furthermore, the as-formed chains can enhance the local magnetic field and attract other magnetic particles nearby, resulting finally as linear nanowires. The formation and the size of nanowires depend strongly on the magnitude of applied magnetic field.

Keywords

Nanowire growth mechanism Nickel nanowires Magnetic-field assisted synthesis
Wang, J., L. Y. Zhang, P. Liu, T. M. Lan, J. Zhang, L. M. Wei, Eric Siu-Wai Kong, C. H. Jiang, and Y. F. Zhang. 2010. “Preparation and Growth Mechanism of Nickel Nanowires under Applied Magnetic Field”. Nano-Micro Letters 2 (2):134-38. https://doi.org/10.1007/BF03353631.
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