Effect of nanotube alignment on percolation conductivity in carbon nanotube/polymer composites

被引:578
作者
Du, FM
Fischer, JE
Winey, KI [1 ]
机构
[1] Univ Penn, Dept Chem & Biomol Engn, Philadelphia, PA 19104 USA
[2] Univ Penn, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA
关键词
D O I
10.1103/PhysRevB.72.121404
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Percolation conductivity of a stick network depends on alignment as well as concentration. We show that both dependences exhibit critical (power-law) behavior, and study the alignment threshold in detail. The highest conductivity occurs for slightly aligned, rather than isotropic, sticks. Experiments on single wall carbon nanotube composites are supported by Monte Carlo simulations. These results should be broadly applicable to percolating networks of anisotropic conductors.
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页数:4
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