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Citation: ZHANG Zeng-Fu, LUO Guo-Hua, FAN Zhuang-Jun, XIANG Rong, ZHOU Li, WEI Fei. Complex Permittivity and Permeability Spectra of Different Kinds of Carbon Nanotubes[J]. Acta Physico-Chimica Sinica, ;2006, 22(03): 296-300. doi: 10.3866/PKU.WHXB20060308 shu

Complex Permittivity and Permeability Spectra of Different Kinds of Carbon Nanotubes

1.
Beijing Key Laboratory of Green Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China

Received Date: 1 September 2005
Available Online: 10 March 2006

Carbon nanotubes (CNTs), with well defined one-dimension nanoscale tubular structure, have potential applications for elctromagnetic wave absorption. The complex permittivity and permeability spectra of different kinds of CNTs were measured in the range from 2 GHz to 18 GHz. The coefficient of attenuation, impedance and loss tangents of different kinds of carbon nanotube composites were compared. The order of loss tangents is as follows: aligned multi-walled CNTs > raw tangled multi-walled CNTs > purified tangled multi-walled CNTs > raw tangled single-walled CNTs > purified tangled single-walled CNTs. The reflectivities of different kinds of carbon nanotube composites were calculated. Compared with multi-walled CNTs, single-walled CNTs have wider absorption capability. Both experimental and calculated results indicated that CNTs as filler in nano-composite materials have excellent elctromagenetic wave absorption properties.
- Single-walled carbon nanotubes; Multi-walled carbon nanotubes; Electromagnetic wave absorption
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沈阳化工大学材料科学与工程学院沈阳 110142

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