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Over 95% of large-scale length uniformity in template-assisted electrodeposited nanowires by subzero-temperature electrodeposition

Sangwoo Shin1, Bo Hyun Kong2, Beom Seok Kim1, Kyung Min Kim1, Hyung Koun Cho2 and Hyung Hee Cho1*

Author Affiliations

1 Department of Mechanical Engineering, Yonsei University, Seoul, 120-749, Korea

2 School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon, Gyeonggi-do, 440-746, Korea

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Nanoscale Research Letters 2011, 6:467  doi:10.1186/1556-276X-6-467

Published: 23 July 2011

Abstract

In this work, we report highly uniform growth of template-assisted electrodeposited copper nanowires on a large area by lowering the deposition temperature down to subzero centigrade. Even with highly disordered commercial porous anodic aluminum oxide template and conventional potentiostatic electrodeposition, length uniformity over 95% can be achieved when the deposition temperature is lowered down to -2.4°C. Decreased diffusion coefficient and ion concentration gradient due to the lowered deposition temperature effectively reduces ion diffusion rate, thereby favors uniform nanowire growth. Moreover, by varying the deposition temperature, we show that also the pore nucleation and the crystallinity can be controlled.

Keywords:
Cu nanowire; template-assisted electrodeposition; length uniformity; low-temperature electrodeposition; nucleation; crystallinity