Multiwalled carbon nanotubes prepared by hydrogen arc

被引：35

作者：

Ando, Y ^{[1
]}

Zhao, X

Kataura, H

Achiba, Y

Kaneto, K

Tsuruta, M

Uemura, S

Iijima, S

机构：

[1] Meijo Univ, Dept Phys, Tempaku Ku, JST,ICORP, Nagoya, Aichi 4688502, Japan

[2] Tokyo Metropolitan Univ, Dept Phys, Hachioji, Tokyo 1920397, Japan

[3] Tokyo Metropolitan Univ, Dept Chem, Hachioji, Tokyo 1920397, Japan

[4] Kyushu Inst Technol, CSE, Iizuka, Fukuoka 8208502, Japan

[5] Ise Elect Corp, Ise 5161103, Japan

来源：

关键词：

electric properties; hydrogen arc discharge; multiwalled carbon nanotubes; Raman spectroscopy; scanning electron microscopy;

D O I：

10.1016/S0925-9635(99)00363-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Multiwalled carbon nanotubes (MWNTs) with high quality were prepared by DC are discharge of pure graphite electrodes in hydrogen gas. Because these MWNTs co-existed with few carbon nanoparticles compared with the usual MWNTs prepared in helium gas, their purification could also easily be done by infrared irradiation in air at 500 degrees C for 30 min. Resonance Raman spectra of purified MWNTs were measured, and breathing modes at about 500 cm(-1) corresponding to a very thin central hole of about 5 Angstrom diameter were found. A new peak at about 1840 cm(-1) appeared for pristine MWNTs, and its intensity strongly depended on the preparation conditions (pressure of hydrogen gas). The measurement of temperature dependence for electric resistance of MWNTs showed metallic or semiconducting tendency. Purified MWNTs could be used as bright and long-life held emitters for cathode ray tubes, and a desirable current density of 1 mA/cm(2) could be stably achieved at a field of 1.2 V/mu m. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：847 / 851

页数：5

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