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

Crystals

Yoshiyuki Suda¹  Koji Maruyama¹  Tetsuo Iida¹  Hirofumi Takikawa¹  Hitoshi Ue⁴  Kazuki Shimizu³  Yoshito Umeda² 

[1] Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, Toyohashi, Aichi 441-8580, Japan;Corporate Research Department, Toho Gas Co., Ltd., Nagoya, Aichi 456-8511, Japan;Development Department, Shonan Plastic Manufacturing Co., Ltd., Hiratsuka, Kanagawa 254-0807, Japan;Fuji Research Laboratory, Tokai Carbon Co., Ltd., Oyama, Shizuoka 410-1431, Japan

关键词: carbon nanocoil;    carbon nanomaterials;    chemical vapor deposition;    nanodevices;    catalyst metals;   

DOI  :  10.3390/cryst5010047

来源: mdpi

【 摘 要 】

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%.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.