| HUANG Hui-ping,HU Li-chu,ZHANG Hai-yan,ZENG Guo-xun,WU Zi-qiu.Study on Permittivity and Permeability of Carbon Nanotubes in the Low-frequency Band from 0.5 t0 6 GHz[J],36(5):20-23 |
| Study on Permittivity and Permeability of Carbon Nanotubes in the Low-frequency Band from 0.5 t0 6 GHz |
| Received:July 05, 2007 Revised:October 10, 2007 |
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| DOI： |
| KeyWord:Carbon nanotubes Passivation Permittivity Permeability |
| Author | Institution |
| HUANG Hui-ping |
Faculty of Material and Energy, Guangdong University of Technology, Guangzhou , China |
| HU Li-chu |
Faculty of Material and Energy, Guangdong University of Technology, Guangzhou , China |
| ZHANG Hai-yan |
Faculty of Material and Energy, Guangdong University of Technology, Guangzhou , China |
| ZENG Guo-xun |
Faculty of Material and Energy, Guangdong University of Technology, Guangzhou , China |
| WU Zi-qiu |
Faculty of Material and Energy, Guangdong University of Technology, Guangzhou , China |
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| Abstract: |
| Carbon Nano Tubes (CNTs) were prepared by the thermal CVD method, and then purified by high-temperature oxidation, concentrated HCI and H2S04/ HN03 mixture. Then these CNTs were analyzed by FTIR, TEM and EDS, to study the change of external structure. The complex permittivity and permeability were measured from 0. 5 t0 6 GHz by the coaxial-waveguide method. The results show that existence of amorphous carbon can improve dielectric loss. It is also found that concentrated HCI or H2S04/ HN03 treatment for long times will change polarization performance and external structure of CNTs, affect the permittivity of CNTs in low-frequency band finally. |
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