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Journal of Nanomaterials
Volume 2010, Article ID 819279, 7 pages
Research Article

Study of the Reaction Rate of Gold Nanotube Synthesis from Sacrificial Silver Nanorods through the Galvanic Replacement Method

1Department of Chemical and Biomolecular Engineering, Specialized Graduate School of Hydrogen and Fuel Cell, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul 120-749, Republic of Korea
2Research and Development Team, Hyundai Hysco, 460-26 Sam-dong, Uiwang-Si, Gyeonggi-do 437-815, Republic of Korea

Received 20 January 2010; Accepted 27 May 2010

Academic Editor: Claude Estournes

Copyright © 2010 Sunil Kwon et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


An investigation was carried out about the gold nanotube synthesis via a galvanic replacement reaction. The progress of the gold nanotube synthesis was investigated using electron microscopy and UV-Vis spectroscopy. In addition, the reaction rates of gold nanotube formation in the early stage of the reaction were studied. The chlorine ion concentration linearly increased with the gold precursor concentration but deviated from the stoichiometric amounts. This deviation was probably due to AgCl precipitates formed by the reaction of chlorine ions with dissolved silver ions. The replacement reaction was promoted with increased temperature and was nonlinearly proportional to the gold ion concentration. The outcomes of this research will enhance the current understanding of the galvanic replacement reaction.