Acta Phys. -Chim. Sin. ›› 2006, Vol. 22 ›› Issue (03): 296-300.doi: 10.3866/PKU.WHXB20060308

• ARTICLE • Previous Articles     Next Articles

Complex Permittivity and Permeability Spectra of Different Kinds of Carbon Nanotubes

ZHANG Zeng-Fu; LUO Guo-Hua; FAN Zhuang-Jun; XIANG Rong; ZHOU Li; WEI Fei   

  1. Beijing Key Laboratory of Green Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China
  • Received:2005-09-01 Revised:2005-10-17 Published:2006-03-10
  • Contact: LUO Guo-Hua E-mail:luoguoh@flotu.org

Abstract: 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.

Key words: Single-walled carbon nanotubes, Multi-walled carbon nanotubes, Electromagnetic wave absorption