The growth mechanism of single-walled carbon nanotubes with a controlled diameter

被引：21

作者：

Yu, Fei ^{[1
,2
]}

Yang, Mingxuan ^{[1
]}

Li, Fanglin ^{[1
]}

Su, Chang ^{[1
]}

Ma, Buyong ^{[3
]}

Yuan, Zhiwen ^{[1
]}

Chen, Junhong ^{[1
,4
]}

Ma, Jie ^{[1
]}

机构：

[1] Tongji Univ, State Key Lab Pollut Control & Resource Reuse, Sch Environm Sci & Engn, Shanghai 200092, Peoples R China

[2] Shanghai Jiao Tong Univ, Sch Environm Sci & Engn, Shanghai 200240, Peoples R China

[3] SAIC Frederick Inc, Ctr Canc Res Nanobiol Program, NCI FCRDC, NIH, Frederick, MD 21702 USA

[4] Univ Wisconsin, Dept Mech Engn, Milwaukee, WI 53211 USA

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2012年 / 44卷 / 10期

基金：

中国国家自然科学基金; 美国国家卫生研究院;

关键词：

CHEMICAL-VAPOR-DEPOSITION; ELECTRICAL-PROPERTIES; DENSITY; TEMPERATURE; ENRICHMENT; ENERGETICS; STABILITY;

D O I：

10.1016/j.physe.2012.06.007

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Understanding the growth mechanism of carbon nanotube is important to control the structure and properties of carbon nanotubes. We examined several aspects of the single wall carbon nanotubes (SWCNTs) prepared by chemical vapor deposition (CVD) processes using ethanol with the additions of ferrocene and thiophene, focusing on the potential mechanisms leading to the differences in the diameters, structures, and conductivities of the SWCNTs formed. The diameter of SWCNTs could be controlled from similar to 1.0 to similar to 5.8 nm by adjusting the concentration of thiophene used. The larger diameter SWCNTs has a higher thermal stability than smaller-diameter SWCNTs. With increasing diameter, the electrical properties of the SWCNT change from mainly semi-conducting to metallic-like. The growth mechanism of SWCNTs was subsequently studied to understand the mechanism of thiophene controlled SWCNTs formation. This study could lead to improved control over the diameter and electronic properties of SWCNTs. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：2032 / 2040

页数：9

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