Diameter Selective Growth of Vertically Aligned Single Walled Carbon Nanotubes and Study on Their Growth Mechanism

被引：25

作者：

Hahm, Myung Gwan ^{[1
]}

Kwon, Young-Kyun ^{[2
,3
]}

Lee, Eunah ^{[4
]}

Ahn, Chi Won ^{[5
]}

Jung, Yung Joon ^{[1
]}

机构：

[1] Northeastern Univ, Dept Mech & Ind Engn, Boston, MA 02115 USA

[2] Kyung Hee Univ, Dept Phys, Seoul 130701, South Korea

[3] Kyung Hee Univ, Res Inst Basic Sci, Seoul 130701, South Korea

[4] HORIBA Jobin Yvon Inc, Mol & Microanal Div, Edison, NJ 08820 USA

[5] Natl Nanofab Ctr, New Technol & Anal Div, Taejon 305806, South Korea

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2008年 / 112卷 / 44期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1021/jp8073877

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：

Diameter controlled vertically aligned single walled carbon nanotubes (VA-SWNTs) were synthesized by controlling flow rate of carbon source and dimension of catalyst nanoparticles. The large scale structural analysis demonstrating spatial distribution of SWNT diameters was conducted by a newly developed Raman Radial Breathing Mode (RBM) mapping technique. Also we investigated the fundamental mechanism of diameter selective growth of SWNTs during the CVD process through computational modeling. Our experimental and computational studies show that a lower flow rate of carbon source makes a smaller nucleation site for a SWNT resulting in a smaller diameter formation. On the other hand, a higher flow rate of carbon source forms a larger nucleation site growing a SWNT with the larger diameter.

引用

页码：17143 / 17147

页数：5