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

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...

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Bibliographic Details
Published in:Crystals (Basel) 2015-03, Vol.5 (1), p.47-60
Main Authors: Suda, Yoshiyuki, Maruyama, Koji, Iida, Tetsuo, Takikawa, Hirofumi, Ue, Hitoshi, Shimizu, Kazuki, Umeda, Yoshito
Format: Article
Language:English
Subjects:
carbon nanocoil
carbon nanomaterials
Catalysis
catalyst metals
Catalysts
Chemical vapor deposition
Computer numerical control
nanodevices
Nanotechnology devices
Purity
Tin dioxide
Tin oxides
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Summary: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%.
ISSN:2073-4352
2073-4352
DOI:10.3390/cryst5010047