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Journal of Nanomaterials
Volume 2017 (2017), Article ID 6379358, 6 pages
Research Article

Bundle Size Engineering of Single-Walled Carbon Nanotubes on Silica Nanoparticles

1Department of Materials Science and Engineering, Inha University, 100 Inha-ro, Nam-gu, Incheon 22212, Republic of Korea
2Department of Mechanical and Industrial Engineering, Northeastern University, 360 Huntington Avenue, Boston, MA 02115, USA

Correspondence should be addressed to Young Lae Kim

Received 16 March 2017; Accepted 7 May 2017; Published 30 May 2017

Academic Editor: Andrew R. Barron

Copyright © 2017 Deok Min Seo 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.


Small and large single-walled carbon nanotubes (SWCNTs) bundles from different-sized cobalt catalyst clusters have been synthesized and prepared through chemical vapor deposition (CVD) method by using Co-acetate ethanol solution with silica nanoparticles. By controlling concentration of Co-acetate ethanol solution (0.2 wt% and 0.4 wt%), various sizes and types of bundle of SWCNTs are grown on the silica nanoparticle substrates. Synthesized SWCNT’s diameter ranged from 0.92 nm to 1.63 nm, and chirality of SWCNTs and their electronic property from high concentration solution show diverse characteristics. In high concentration solution, the large number of cobalt clusters is induced to merge on the surface of silica nanoparticles and then lots of nucleation points are provided by cobalt clusters for growth of SWNTs. These results give us a promising path to selectively synthesize various types of SWCNTs with different shapes of merged cobalt catalyst. Engineering bundle sizes of SWCNTs can be promising key for diverse applications of carbon nanotubes.