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Papers by Keyword: Multiwall Carbon Nanometer Tube (MCNT)

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Synthesis of Highly Aligned Carbon Nanotubes in Liquid Phase

Authors: Masafumi Mikami, Kiyofumi Yamagiwa, Tsuneharu Takeuchi, Morihiro Saito, Jun Kuwano

Abstract: Aligned carbon nanotube arrays (CNTAs) were readily synthesized by a resistance heating method on a substrate of commercially available stainless steel which has more plentiful availability than the wafers of Si and quarts. The catalyst was supported on the substrate by dip coating with a methanol solution of M(C5H5)2(M=Co,Fe), and the substrate was electrically heated at 800oC in methanol. Highly aligned CNTAs were grown from the catalyst prepared from 0.02 M Co(C5H5)2 methanol solution. The alignment was influenced by the concentration and the kind of M(C5H5)2.

The Dispersion of MWCNTs within Epoxy by Treatment with Coupling and Dispersing Agents

Authors: Yan Zhao, Yue Xin Duan

Abstract: The dispersion of CNTs (Carbon Nanotubes) within polymer matrix is a big obstruction to restrict the application of CNTs. In this paper, the dispersion of MWCNTs(Multi-walled Carbon Nanotubes) within epoxy resin, which was improved by the coupling agent Volan and dispersing agent BYK, were studied. It showed that the best dispersing result of MWCNTs was obtained by combination treatment of Volan and BYK.

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Preparation of a Low Cost Carbon Nanotubes Field Electron Emission Thin Film and its Initial Application Research

Authors: G.Y. Liu, C.Y. Zhi, Shan Hong Xia, J.G. Zhang, H.Y. Li, J.X. Yang, S. Liu, Enge G. Wang

Abstract: A large area perfect aligned carbon nanotubes (CNTs) thin film was grown directly on a stainless steel substrates by a low cost bias-assisted hot-filament chemical-vapor deposition (BA HF-CVD) technology. The CNT’s / stainless steel field emission array (FEA) cathode (CNT’s/FEA) has been fabricated. The field electron emission behavior of the CNT’s/FEA cathode was characterized in a vacuum condition, a high electron emission of about 10mA/cm2 at a low electric field of 4V/μm implies the promising the application as a cathode of the flat panel display device, so further assembled this cathode in a kind of vacuum device, and the possibility of the operation from a flat panel character (Pictures) display tube FCT has been tested initially.

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Synthesis of Carbon Nanotubes from Polycyclic Compounds by CVD Method

Authors: Koji Yamada, Kentaro Abe, Masafumi Mikami, Morihiro Saito, Jun Kuwano

Abstract: Multi-walled carbon nanotubes (MWCNTs) were synthesized from camphor by a chemical vapor deposition (CVD) method in a range of 750-900. The catalyst was fed in three ways: (a) a sputtered Fe-film on a quartz substrate (b) vaporized ferrocene in an Ar flow; (c) both of (a) and (b). In the case (c), highly pure, dense and aligned MWCNT arrays formed on the quartz substrate at 850, whereas nonaligned MWCNTs formed in the cases (a) and (b).

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