Effect of Growth Pressure on the Synthesis of Vertically Aligned Carbon Nanotubes and Their Growth Termination

被引：3
|
作者：
Park, Sangeun [1 ]
Song, Wooseok [1 ]
Kim, Yooseok [1 ]
Song, Inkyung [1 ]
Kim, Sung Hwan [1 ]
Lee, Su Il [1 ]
Jang, Sung Won [1 ]
Park, Chong-Yun [1 ,2 ]
机构：
[1] Sungkyunkwan Univ, Phys Res Div BK21, Suwon 440746, South Korea
[2] Sungkyunkwan Univ, Dept Energy Sci, Suwon 440746, South Korea
来源：
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2014年 / 14卷 / 07期
基金：
新加坡国家研究基金会;
关键词：
Vertically Aligned Carbon Nanotubes; Chemical Vapor Deposition; Working Pressure; DEPENDENT GROWTH; YARNS; EMISSION; KINETICS; FORESTS; RANGE; ARRAY; WATER;
D O I：
10.1166/jnn.2014.7751
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
When vertically aligned carbon nanotubes (VACNTs) are synthesized by thermal chemical vapor deposition (TCVD), their structural features such as height and density can be determined by TCVD growth conditions. In this study we investigated the effect of growth pressure on the structural features of VACNTs. Changes in growth pressure significantly affected the height, density, and crystalinity of synthesized VACNTs. In addition, we suggest that the growth termination of VACNTs could be due to the lack of carbon feedstock supply to the center of the VACNT film induced by the pressure-dependent adsorption of amorphous carbon at the edge of the VACNT film. In addition, the field emission characteristics of the VACNT film were carried out. The turn-on voltage of the VACNT film was 1.62 V/mu m and the field enhancement factor (beta) was 2478. These results provide useful information for practical applications of VACNTs, such as field emission display and X-ray source.
引用
收藏
页码：5216 / 5220
页数：5
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