Nitrogen doping effects on the structure behavior and the field emission performance of double-walled carbon nanotubes

被引：90
作者：
Chun, Kyoung-Yong [1 ]
Lee, Heon Sang [2 ]
Lee, Cheol Jin [1 ]
机构：
[1] Korea Univ, Sch Elect Engn, Seoul 136701, South Korea
[2] LG Chem Ltd, Ctr Technol, Taejon 305343, South Korea
来源：
CARBON | 2009年 / 47卷 / 01期
关键词：
CHEMICAL-VAPOR-DEPOSITION; ELECTRON-EMISSION; HYDROGEN STORAGE; TEMPERATURE; BORON; GROWTH; FILMS; ATOMS;
D O I：
10.1016/j.carbon.2008.09.047
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：
The nitrogen (N) doping effect and field emission properties of double-walled carbon nanotubes (DWCNTs) were investigated. Diameter transformation and defect generation in the N-doped DWCNTs mainly depend on the amount of nitrogen employed. By applying N-doping into DWCNTs (1.5 N at.%), the average diameters of the DWCNTs were increased from 1.7 to 2.4 nm, and the crystallinity (I-G/I-D) was decreased from 13.5 to 5. Field emission properties were enhanced by the N doping into DWCNTs. The turn-on field, corresponding to a current density of 0.1 mu A/cm(2), was about 0.9V/mu m for the N-doped DWCNTs (1.5 N at.%). The field enhancement factor of the N-doped DWCNTs was higher than that of the undoped DWCNTs. It was found that the field emission properties were controlled by pyridine-like N in the graphite due to N-doping. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：169 / 177
页数：9
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