Field emission properties of carbon nanotubes synthesized by capillary type atmospheric pressure plasma enhanced chemical vapor deposition at low temperature

被引：30

作者：

Kyung, Se-Jin ^{[1
]}

Lee, Yong-Hyuk ^{[1
]}

Kim, Chan-Woo ^{[1
]}

Lee, June-Hee ^{[1
]}

Yeom, Geun-Young ^{[1
]}

机构：

[1] Sungkyunkwan Univ, Dept Mat Sci & Engn, Suwon 440746, South Korea

来源：

CARBON | 2006年 / 44卷 / 08期

关键词：

carbon nanotubes; chemical vapor deposition; scanning electron microscopy; field emission;

D O I：

10.1016/j.carbon.2005.12.020

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：

Carbon nanotubes (CNTs) were grown using a modified atmospheric pressure plasma with NH3(210 sccm)/N-2(100 SCCM)/ C2H2(150 sccm)/He(8 slm) at low substrate temperatures (<= 500 degrees C) and their physical and electrical characteristics were investigated as the application to field emission devices. The grown CNTs were multi-wall CNTs (at 450 degrees C, 15-25 layers of carbon sheets, inner diameter: 10-15 nm, outer diameter: 30-50 nm) and the increase of substrate temperature increased the CNT length and decreased the CNT diameter. The length and diameter of the CNTs grown for 8 min at 500 degrees C were 8 mu m and 40 +/- 15 nm, respectively. Also, the defects in the grown CNTs were also decreased with increasing the substrate temperature (The ratio of defect to graphite (I-D/I-G) measured by FT-Raman at 500 degrees C was 0.882). The turn-on electric field of the CNTs grown at 450 degrees C was 2.6 V/mu m and the electric field at 1 mA/cm(2) was 3.5 V/mu m. (C) 2005 Elsevier Ltd. All rights reserved.

引用

页码：1530 / 1534

页数：5

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