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Journal of Nanomaterials
Volume 2013 (2013), Article ID 325827, 8 pages
http://dx.doi.org/10.1155/2013/325827
Research Article

The Geometry Variation of As-Grown Carbon Coils with Ni Layer Thickness and Hydrogen Plasma Pretreatment

Department of Engineering in Energy and Applied Chemistry, Silla University, Busan 617-736, Republic of Korea

Received 6 February 2013; Accepted 11 March 2013

Academic Editor: Amir Kajbafvala

Copyright © 2013 Young-Chul Jeon 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.

Abstract

Carbon coils could be synthesized using C2H2/H2 as source gases and SF6 as an incorporated additive gas under thermal chemical vapor deposition system. Ni layer on SiO2 substrate was used as a catalyst for the formation of carbon coils. Ni powder was evaporated to form Ni layer on the substrate. The characteristics (formation densities, morphologies, and geometries) of as-grown carbon coils on the substrate were investigated as a function of the evaporation time for Ni catalyst layer formation. By hydrogen plasma pretreatment prior to carbon coils synthesis reaction, the dominant formation of the nanosized wave-like geometry of carbon coils could be achieved. The characteristics of as-grown carbon coils with or without hydrogen plasma pretreatment process were investigated. The cause for the control of the carbon coils geometries from the microsized type to the nanosized wave-like one by H2 plasma pretreatment was discussed in association with the stress of Ni catalyst layer on the substrate.