Diameter-control of single-walled carbon nanotubes produced by magnetic field-assisted arc discharge

被引：34

作者：

Su, Yanjie ^{[1
]}

Zhang, Yaozhong ^{[1
]}

Wei, Hao ^{[1
]}

Yang, Zhi ^{[1
]}

Kong, Eric Siu-Wai ^{[1
]}

Zhang, Yafei ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Key Lab Thin Film & Microfabricat Technol, Minist Educ, Res Inst Micro Nanometer Sci & Technol, Shanghai 200240, Peoples R China

来源：

CARBON | 2012年 / 50卷 / 07期

基金：

中国国家自然科学基金;

关键词：

RAMAN-SCATTERING;

D O I：

10.1016/j.carbon.2012.02.013

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：

We have demonstrated a scalable approach to synthesize single-walled carbon nanotubes (SWCNTs) with selected diameter distributions by applying a magnetic field perpendicular to the electric field in the arc plasma. It is found that the purity and orientation of SWCNTs can be controlled by the magnetic field. SWCNTs with different diameter distributions can be separated into two different regions by the applied magnetic field, and the diameter-selection efficiency is improved by modifying the direction of the magnetic field. Our findings suggest that the motion of the catalyst particles with different sizes, positive carbon ions and electrons are significantly influenced by Lorentz forces, resulting in the difference in the growth processes of the swCNTs due to the collective interactions between the arc plasma and the magnetic field. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：2556 / 2562

页数：7

共 28 条

[1] Near-infrared optical sensors based on single-walled carbon nanotubes [J].