Correlation between catalyst particle and single-walled carbon nanotube diameters

被引：229
|
作者：
Nasibulin, AG
Pikhitsa, PV
Jiang, H
Kauppinen, EI [1 ]
机构：
[1] VTT Proc, Aerosol Technol Grp, POB 1602, FIN-02044 Espoo, Finland
[2] Aalto Univ, Ctr New Mat, FIN-02044 Espoo, Finland
[3] Aalto Univ, Dept Engn Math & Phys, FIN-02044 Espoo, Finland
[4] Seoul Natl Univ, Inst Adv Machinery & Design, Natl CRI Ctr Nano Particle Control, Seoul 151742, South Korea
来源：
CARBON | 2005年 / 43卷 / 11期
基金：
芬兰科学院;
关键词：
carbon nanotubes; catalyst support; electron microscopy;
D O I：
10.1016/j.carbon.2005.03.048
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：
Single-walled carbon nanotubcs (CNTs) were synthesised at different conditions by a novel aerosol method based on the introduction of pre-formed iron catalyst particles into conditions leading to CNT formation. The results of statistical measurements of individual CNT dimensions based on high-resolution TEM images showed the effects of the residence time and temperature in the reactor. The ratio between catalyst particle and CNT diameters was close to 1.6 and independent of the experimental conditions, thus revealing an astonishing "universality" in the growth process. A proposed geometric model of heptagon defect formation, which initiates and maintains the CNT growth, allowed us to theoretically explain the phenomenon. (C) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2251 / 2257
页数：7
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