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

被引：93

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

页码：169 / 177

页数：9

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