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Crystals 2015, 5(1), 47-60; doi:10.3390/cryst5010047

High-Yield Synthesis of Helical Carbon Nanofibers Using Iron Oxide Fine Powder as a Catalyst

1
Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, Toyohashi, Aichi 441-8580, Japan
2
Fuji Research Laboratory, Tokai Carbon Co., Ltd., Oyama, Shizuoka 410-1431, Japan
3
Development Department, Shonan Plastic Manufacturing Co., Ltd., Hiratsuka, Kanagawa 254-0807, Japan
4
Corporate Research Department, Toho Gas Co., Ltd., Nagoya, Aichi 456-8511, Japan
*
Author to whom correspondence should be addressed.
Academic Editor: Daniele Gozzi
Received: 15 September 2014 / Accepted: 22 December 2014 / Published: 8 January 2015
(This article belongs to the Special Issue Carbon Nanostructures)
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Abstract

Carbon nanocoil (CNC), which is synthesized by a catalytic chemical vapor deposition (CCVD) method, has a coil diameter of 300–900 nm and a length of several tens of μm. Although it is very small, CNC is predicted to have a high mechanical strength and hence is expected to have a use in nanodevices such as electromagnetic wave absorbers and field emitters. For nanodevice applications, it is necessary to synthesize CNC in high yield and purity. In this study, we improved the conditions of catalytic layer formation and CCVD. Using optimized CVD conditions, a CNC layer with a thickness of >40 μm was grown from a SnO2/Fe2O3/SnO2 catalyst on a substrate, and its purity increased to 81% ± 2%. View Full-Text
Keywords: carbon nanocoil; carbon nanomaterials; chemical vapor deposition; nanodevices; catalyst metals carbon nanocoil; carbon nanomaterials; chemical vapor deposition; nanodevices; catalyst metals
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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. (CC BY 4.0).

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MDPI and ACS Style

Suda, Y.; Maruyama, K.; Iida, T.; Takikawa, H.; Ue, H.; Shimizu, K.; Umeda, Y. High-Yield Synthesis of Helical Carbon Nanofibers Using Iron Oxide Fine Powder as a Catalyst. Crystals 2015, 5, 47-60.

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