Tunable effective permittivity of carbon nanotube composites
Tunable effective permittivity of carbon nanotube composites
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DOI：
10.1063/1.2983745
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发表时间：
2008-09
影响因子：
4
通讯作者：
Lei Liu;L. Kong;S. Matitsine
中科院分区：
文献类型：
--
作者：
Lei Liu;L. Kong;S. Matitsine
制备了以碳纳米管（CNTs）为夹杂物的复合材料，并研究了偏压下的介电性能。结果表明，碳纳米管质量分数大于6wt%的复合材料在外加偏压下表现出可调的介电特性，其真实的部分随外加偏压的增加而减小，虚部分随外加偏压的增加而增大。可以从渗流阈值的角度来理解可调特性。碳纳米管复合材料的这种可调特性的潜在应用包括智能材料和结构。
Composites with carbon nanotubes (CNTs) as inclusions were prepared and the dielectric properties under bias voltages were studied. It was found that the composites with weight concentrations of CNTs above 6 wt % exhibited tunable dielectric characteristics under an external applied bias voltage with real part decreasing while the imaginary part increases with the increasing applied voltage. The tunable properties may be understood from the percolation threshold point of view. Potential applications of such tunable properties of the CNTs composites include smart materials and structures.