Structural transformation and field emission enhancement of carbon nanofibers by energetic argon plasma post-treatment

被引：47

作者：

Weng, CH ^{[1
]}

Leou, KC ^{[1
]}

Wei, HW ^{[1
]}

Juang, ZY ^{[1
]}

Wei, MT ^{[1
]}

Tung, CH ^{[1
]}

Tsai, CH ^{[1
]}

机构：

[1] Natl Tsing Hua Univ, Dept Engn & Syst Sci, Hsinchu, Taiwan

来源：

APPLIED PHYSICS LETTERS | 2004年 / 85卷 / 20期

关键词：

D O I：

10.1063/1.1815062

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Vertically aligned carbon nanofibers (CNFs) grown by plasma enhanced chemical vapor deposition (PECVD) were transformed into cone-shaped nanostructures after treatment by argon (Ar) plasma. Significant enhancement of field emission characteristics of the post-treated CNFs has been achieved. Analysis by electron microscopy and energy dispersive spectroscopy (EDS) suggests that the structural transformation is a result of a cosputtering/deposition process by energetic plasma ions. The enhancements can be attributed to the combining effects of an additional Si/C layer coverage, catalytic nanoparticles removal and the sharpening of CNFs tips. The argon plasma post-treatment processes developed here can be easily extended to in situ PECVD processes for fabricating CNFs based emitters. (C) 2004 American Institute of Physics.

引用

页码：4732 / 4734

页数：3

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