Aspect ratio control of acid modified multiwalled carbon nanotubes

被引：22

作者：

Kim, Don-Young ^{[1
]}

Yun, Young Soo ^{[1
]}

Bak, Hyeonseong ^{[1
]}

Cho, Se Youn ^{[1
]}

Jin, Hyoung-Joon ^{[1
]}

机构：

[1] Inha Univ, Dept Polymer Sci & Engn, Inchon 402751, South Korea

来源：

CURRENT APPLIED PHYSICS | 2010年 / 10卷 / 04期

关键词：

Carbon nanotubes; Aspect ratio; Electrical conductivity; Polymer composites; THERMOGRAVIMETRIC ANALYSIS; PURIFICATION; OXIDATION; LENGTH; STATE;

D O I：

10.1016/j.cap.2009.12.038

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This study examined the effects of acid treatments on the length of multiwalled carbon nanotubes (MWCNTs) as well as the influence of the aspect ratio of the MWCNTs on the electrical percolation threshold. In particular, the length distribution, intensity ratio of the G and D Raman peaks, BET surface area, and maximum decomposition temperatures of the MWCNTs were investigated. The MWCNTs showed different electrical percolation thresholds depending on the aspect ratio. The higher aspect ratio MWCNTs had lower electrical percolation thresholds than those with smaller ratios due to their ease of contact with other MWCNTs. In terms of the electrical behavior of a MWCNT film, many more short MWCNTs were necessary to reach the electrical percolation threshold than long MWCNTs. These results demonstrate the need to control the aspect ratio of MWCNTs in order for them to be used efficiently in electrical applications. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：1046 / 1052

页数：7

共 34 条

[1]

Ajayan PM, 2000, ADV MATER, V12, P750, DOI 10.1002/(SICI)1521-4095(200005)12:10<750::AID-ADMA750>3.0.CO

[2]

2-6

[3] Multiwall carbon nanotubes: Synthesis and application [J].

Andrews, R ;

Jacques, D ;

Qian, DL ;

Rantell, T .

ACCOUNTS OF CHEMICAL RESEARCH, 2002, 35 (12) :1008-1017

[4] Purification and structural annealing of multiwalled carbon nanotubes at graphitization temperatures [J].

Andrews, R ;

Jacques, D ;

Qian, D ;

Dickey, EC .

CARBON, 2001, 39 (11) :1681-1687

[5] Thermogravimetric analysis of the oxidation of multiwalled carbon nanotubes: Evidence for the role of defect sites in carbon nanotube chemistry [J].

Bom, D ;

Andrews, R ;

Jacques, D ;

Anthony, J ;

Chen, BL ;

Meier, MS ;

Selegue, JP .

NANO LETTERS, 2002, 2 (06) :615-619

[6] Defects in carbon nanotubes [J].

Charlier, JC .

ACCOUNTS OF CHEMICAL RESEARCH, 2002, 35 (12) :1063-1069

[7] A model for the dependence of carbon nanotube length on acid oxidation time [J].

Forrest, Gavin A. ;

Alexander, Andrew J. .

JOURNAL OF PHYSICAL CHEMISTRY C, 2007, 111 (29) :10792-10798

[8] Kinetically controlled growth of helical and zigzag shapes of carbon nanotubes [J].

Gao, RP ;

Wang, ZL ;

Fan, SS .

JOURNAL OF PHYSICAL CHEMISTRY B, 2000, 104 (06) :1227-1234

[9] HELICAL MICROTUBULES OF GRAPHITIC CARBON [J].

IIJIMA, S .

NATURE, 1991, 354 (6348) :56-58

[10] Carbon nanotube-adsorbed polystyrene and poly(methyl methacrylate) microspheres [J].

Jin, HJ ;

Choi, HJ ;

Yoon, SH ;

Myung, SJ ;

Shim, SE .

CHEMISTRY OF MATERIALS, 2005, 17 (16) :4034-4037

← 1 2 3 4 →