%0 Journal Article
%T High-Yield Synthesis of Helical Carbon Nanofibers Using Iron Oxide Fine Powder as a Catalyst
%A Yoshiyuki Suda
%A Koji Maruyama
%A Tetsuo Iida
%A Hirofumi Takikawa
%A Hitoshi Ue
%A Kazuki Shimizu
%A Yoshito Umeda
%J Crystals
%P 47-60
%D 2015
%I MDPI AG
%R 10.3390/cryst5010047
%X Carbon nanocoil (CNC), which is synthesized by a catalytic chemical vapor deposition (CCVD) method, has a coil diameter of 300¨C900 nm and a length of several tens of ¦Ìm. 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 ¦Ìm was grown from a SnO 2/Fe 2O 3/SnO 2 catalyst on a substrate, and its purity increased to 81% ¡À 2%.
%K carbon nanocoil
%K carbon nanomaterials
%K chemical vapor deposition
%K nanodevices
%K catalyst metals
%U http://www.mdpi.com/2073-4352/5/1/47