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http://dx.doi.org/10.5757/JKVS.2013.22.6.277

Synthesis of the Carbon Nano/micro Coils Applicable to the Catalyst Support to Hold the Tiny Catalyst Grain  

Park, Chan-Ho (Department of Engineering in Energy and Applied Chemistry, Silla University)
Kim, Sung-Hoon (Department of Engineering in Energy and Applied Chemistry, Silla University)
Publication Information
Journal of the Korean Vacuum Society / v.22, no.6, 2013 , pp. 277-284 More about this Journal
Abstract
Carbon coils could be synthesized using $C_2H_2/H_2$ as source gases and $SF_6$ as an incorporated additive gas under thermal chemical vapor deposition system. The Ni layer on the $SiO_2$ substrate was used as a catalyst for the formation of the carbon coils. The characteristics (formation densities, morphologies, and geometries) of the as-grown carbon coils on the substrate with or without the $H_2$ plasma pretreatment process were investigated. By the relatively short time (1 minute) $H_2$ plasma pretreatment on the Ni catalyst layered-substrate prior to the carbon coils synthesis reaction, the dominant formation of the carbon microcoils on the substrate could be achieved. After the relatively long time (30 minutes) $H_2$ plasma pretreatment process, on the other hand, we could obtain the noble-shaped geometrical nanostructures, namely the formation of the numerous carbon nanocoils along the growth of the carbon microcoils. This noble-shaped geometrical nanostructure seemed to play a promising role as the good catalyst support for holding the very tiny Ni catalyst grains.
Keywords
Carbon coils; $H_2$ plasma pretreatment; Geometry variation; Catalyst support; Thermal chemical vapor deposition;
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