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Well-aligned carbon nanofibers synthesized by electron cyclotron resonance chemical vapor deposition

Published online by Cambridge University Press:  15 March 2011

Fumiyuki Hoshi ,
Kazuo Tsugawa ,
Akiko Goto ,
Takefumi Ishikura ,
Motoo Yumura ,
Yoshinori Koga ,
Satoshi Yamashita ,
Takashi Hirao ,
Shuzou Fujiwara  and
Motoo Yumura
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Fumiyuki Hoshi
Affiliation:
FCT Research Laboratory, JFCC, c/o NIMC, Japan
Kazuo Tsugawa
Affiliation:
FCT Research Laboratory, JFCC, c/o NIMC, Japan
Akiko Goto
Affiliation:
FCT Research Laboratory, JFCC, c/o NIMC, Japan
Takefumi Ishikura
Affiliation:
FCT Research Laboratory, JFCC, c/o NIMC, Japan
Motoo Yumura
Affiliation:
FCT Research Laboratory, JFCC, c/o NIMC, Japan
Yoshinori Koga
Affiliation:
FCT Research Laboratory, JFCC, c/o NIMC, Japan
Satoshi Yamashita
Affiliation:
Frontier Technology Laboratory, Tokyo Gas CO., LTD, Japan
Takashi Hirao
Affiliation:
Department of Electric Engineering, Osaka University, Japan
Shuzou Fujiwara
Affiliation:
Department of Advanced Chemical Technology, NIMC, Japan
Motoo Yumura
Affiliation:
Department of Advanced Chemical Technology, NIMC, Japan
Yoshinori Koga
Affiliation:
Department of Advanced Chemical Technology, NIMC, Japan
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Abstract

Aligned carbon nanofibers and hollow carbon nanofibers were grown by MW ECR-CVD method using methane and argon mixture gas at the temperature of 550••. Carbon nanofibers and hollow carbon nanofibers were deposited perpendicularly on Si substrate and on Si substrate coated with Ni catalyst, respectively. Raman spectra of aligned carbon nanofibers and hollow carbon nanofibers showed new bands of 1340 and 1612 cm-1 of the first-order Raman scattering and 2660, 2940 and 3220 cm-1 of the second-order Raman scattering. The second-order Raman scattering bands were assigned to two overtone and one combination bands on the basis of a similar assignment of micro crystal graphite. Combination bands are intense unusually. Field emitter characteristics of the well-aligned carbon nanofibers and hollow carbon nanofiberswere investigated and the current densities were 7.25 mA/cm2 and 0.69 mA/cm2at 12.5 V/μm, respectively.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 633: Symposium A – Nanotubes and Related Materials , 2000 , A6.2
Copyright
Copyright © Materials Research Society 2001

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