Electron field emission from carbon nanotubes and undoped nano-diamond

被引：44

作者：

Wang, SG ^{[1
]}

Zhang, Q ^{[1
]}

Yoon, SF ^{[1
]}

Ahn, J ^{[1
]}

Yang, DJ ^{[1
]}

Wang, Q ^{[1
]}

Zhou, Q ^{[1
]}

Li, JQ ^{[1
]}

机构：

[1] Nanyang Technol Univ, Sch Elect & Elect Engn, Ctr Microelect, Clean Room & Characterizat Lab, Singapore 639798, Singapore

来源：

关键词：

carbon nanotubes; nano-diamond; electron field emission; MPECVD;

D O I：

10.1016/S0925-9635(02)00242-X

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, the electron field emission characteristics of carbon nanotubes (CNTs) and undoped nano-diamond film have been investigated and compared by measuring the electron field emission I-V curve, the emission site density and the emission C, stability. The CNTs and undoped nano-diamond film were grown in the same microwave plasma enhanced chemical vapor deposition reactor using CH4/H-2 and CH4/Ar mixtures, respectively. The morphologies and structures of CNTs and nano-diamond were characterized using field emission scanning electron microscopy, transmission electron microscopy and Raman spectroscopy. The field emission results show that CNTs exhibit a lower threshold electric field of 1.3 V/mum and a much higher emission current density of 1620 muA/cm(2) at 2.72 V/mum compared to nano-diamond, which exhibits 3.8 V/mum and 540 muA/cm(2) at 6.65 V/mum, respectively. However, CNTs have slightly lower emission stability than the nano-diamond. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：8 / 14

页数：7

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