The Effect of Length of Single-Walled Carbon Nanotubes (SWNTs) on Electrical Properties of Conducting Polymer-SWNT Composites

被引：21
作者：
Singh, Inderpreet [1 ]
Verma, A. [1 ]
Kaur, I. [2 ]
Bharadwaj, L. M. [2 ]
Bhatia, V. [3 ]
Jain, V. K. [3 ]
Bhatia, C. S. [4 ]
Bhatnagar, P. K. [1 ]
Mathur, P. C. [1 ]
机构：
[1] Univ Delhi, Dept Elect Sci, Mat Lab, New Delhi 110021, India
[2] Cent Sci Instruments Org, Sector 30, Chandigarh, India
[3] Amity Univ, Amity Inst Adv Res & Study Mat & Devices, Sector 125, Noida, India
[4] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117548, Singapore
来源：
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS | 2010年 / 48卷 / 01期
关键词：
charge transport; conducting polymers; nanocomposites; single-walled carbon nanotubes; thin films; AC CONDUCTIVITY; STRENGTH;
D O I：
10.1002/polb.21847
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
DC conductivity of conjugated polymer-single-walled carbon nanotube (SWNT) composite films has been measured for different SWNT concentrations, The composite was prepared by dispersing SWNTs in the poly (3-octylthiophene), P3OT matrix already dissolved in xylene. The conductivity of the composite films showed a rapid increase as the SWNT concentration increases beyond a certain value. This behavior is explained in terms of percolating paths provided by the SWNTs in the volume of polymer matrix. To investigate the effect of length of nanotubes on the percolation conductivity, different SWNT samples were employed with similar diameter but varying tube lengths. It was found that the conductivity of the composite films is strongly dominated by the length of the nanotubes. Lower percolation limit and high conductivity value of composite films is observed for longer nanotubes. Furthermore, the conductivity is observed to be dependent on the size of the host polymer molecule also. (C) 2009 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 48: 89-95, 2010
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页码：89 / 95
页数：7
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