Field emission from camphor-pyrolyzed carbon nanotubes

被引：45

作者：

Kumar, M ^{[1
]}

Kakamu, K ^{[1
]}

Okazaki, T ^{[1
]}

Ando, Y ^{[1
]}

机构：

[1] Meijo Univ, Dept Mat Sci & Engn, COE Nanofactory, Tempaku Ku, Nagoya, Aichi 4688502, Japan

来源：

CHEMICAL PHYSICS LETTERS | 2004年 / 385卷 / 3-4期

关键词：

D O I：

10.1016/j.cplett.2003.12.064

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Vertically aligned nanotubes, grown on various substrates by thermal decomposition of a botanical hydrocarbon-camphor, were investigated for field emission application. In a parallel plate (similar to500 gm apart) field emission device, as-grown nanotubes exhibited a turn-on field as low as 2.6 V/mum, whereas the maximum current density observed was 14 mA/cm(2) at an applied field of 7.7 V/mum. Utilizing such an emission efficiency of camphor-grown nanotubes, a model field emission microscope was fabricated with isolated nanotube emitters and informative emission patterns were observed on a fluorescent screen (placed at a working distance of 1-5 cm) at low applied voltages of 300-1000 V. Presence of localized density of states corresponding to pentagonal defects at the emitter tip was identified and discussed. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：161 / 165

页数：5

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