Synthesis and field emission property of carbon nanotubes with sharp tips

被引：20

作者：

Zhang Yan-li ^{[1
]}

Zhang Li-li ^{[1
]}

Hou Peng-xiang ^{[1
]}

Jiang Hua ^{[2
,3
]}

Liu Chang ^{[1
]}

Cheng Hui-ming ^{[1
]}

机构：

[1] Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China

[2] Aalto Univ, Dept Appl Phys, FIN-02150 Espoo, Finland

[3] Aalto Univ, Ctr New Mat, FIN-02150 Espoo, Finland

来源：

NEW CARBON MATERIALS | 2011年 / 26卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Carbon nanotubes; Sharp tip; Field emission;

D O I：

10.1016/S1872-5805(11)60065-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Carbon nanotubes (CNTs) with sharp tips were synthesized by a hydrogen arc discharge method. Three unusual morphologies, i.e., a cone-shaped tip, a suddenly-shrinking tip, and a pencil point-like tip were observed. These novel tip structures are considered to be related to the addition of a small amount of silicon powder in the raw material, which may introduce structural defects in the CNTs. The field emission property of the sharp-tip CNTs was investigated, and a low threshold electric field of 3.75 V/m, a high field emission current density of similar to 1.6x10(5) A/cm(2), and a good emission stability were demonstrated. The superior field emission performance of the CNTs can be attributed to their good crystallinity and unique tip structures.

引用

页码：52 / 55

页数：4

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