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Double-wall Carbon Nanotubes Synthesized by the Abnormal Glow Discharge Plasma Method

Published online by Cambridge University Press:  11 February 2011

Hiromichi Yoshikawa ,
Fumiyuki Hoshi ,
Mutsumasa Kyotani ,
Takefumi Ishikura ,
Motoo Yumura  and
Yoshinori Koga
Hiromichi Yoshikawa
Affiliation:
FCT Research Laboratory, JFCC, 1–1–1 Higashi, Tsukuba, Ibaraki, Japan
Fumiyuki Hoshi
Affiliation:
FCT Research Laboratory, JFCC, 1–1–1 Higashi, Tsukuba, Ibaraki, Japan
Mutsumasa Kyotani
Affiliation:
FCT Research Laboratory, JFCC, 1–1–1 Higashi, Tsukuba, Ibaraki, Japan
Takefumi Ishikura
Affiliation:
Frontier Technology Laboratory, Tokyo Gas Co., Ltd, 1–7–7 Suehiro, Tsurumi, Yokohama, Kanagawa, Japan
Motoo Yumura
Affiliation:
National Institute of Advanced Industrial Science and Technology, 1–1–1 Higashi, Tsukuba, Ibaraki, Japan
Yoshinori Koga
Affiliation:
National Institute of Advanced Industrial Science and Technology, 1–1–1 Higashi, Tsukuba, Ibaraki, Japan
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Abstract

Double-wall carbon nanotubes (DWCNTs) and single-wall carbon nanotubes (SWCNTs) have been synthesized by the DC abnormal glow discharge plasma CVD method using methane and hydrogen gas on a Si substrate coated with catalyst. Fe(NO3)2 and Mo(CH3COCHCOCH3)2O2 with Al2O3 support were used as catalysts. The growth temperatures were 1000 − 1400°C and the gas pressures were 9kPa - 13kPa. DC plasma was generated between an array of four W cathodes and a Cu disk anode, and the applied power was 4000–10000W (2.5–4.0A per cathode, 400–800V). Samples were characterized by high-resolution transmission electron microscopy (HRTEM) and micro-Raman spectroscopy using 514.5 nm Ar ion laser excitation. The HRTEM images showed that many carbon nanotubes had a concentric cylindrical graphene layer structure (DWCNTs). We measured the diameters of the carbon nanotubes (CNTs) from HRTEM images. The outer diameter of the DWNT was 1.52–1.64nm and the inner diameter of the DWNT was 0.73–0.81nm.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 750: Symposium Y – Surface Engineering 2002–Synthesis, Characterization and Applications , 2002 , Y5.48
Copyright
Copyright © Materials Research Society 2003

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References

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