| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Tunable Dielectric Properties of Carbon Nanotube@Polypyrrole Core-Shell Hybrids by the Shell Thickness for Electromagnetic Wave Absorption |
| De-Ting Wang, Xian-Chao Wang, Xiao Zhang, Hao-Ran Yuan, Yu-Jin Chen** |
Key Laboratory of In-Fiber Integrated Optics (Ministry of Education), and College of Physics and Optoelectronic Engineering, Harbin Engineering University, Harbin 150001
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| Cite this article: |
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De-Ting Wang, Xian-Chao Wang, Xiao Zhang et al 2020 Chin. Phys. Lett. 37 045201 |
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Abstract Carbon nanotube@polypyrrole (CNT@PPy) hybrids have been successfully fabricated via a simple in situ chemical oxidation polymerization. The thickness of the PPy shell can be finely controlled in the range of 3.0–6.4 nm. The dielectric loss of core-shell hybrids can be tuned by the shell thickness, resulting in a well-matched characteristic impedance that can enhance electromagnetic wave (EMW) absorption performance. Minimum reflection loss of the hybrid with moderate PPy shell thickness can reach $-51.4$ dB at 11.8 GHz with a matching thickness of merely 2 mm. Furthermore, the minimum reflection loss values of the hybrid are below $-30$ dB even at thickness in the range of 1.4–1.9 mm, endowing the possibility of practical application of the hybrids in electromagnetic wave absorption field.
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Received: 02 January 2020
Published: 24 March 2020
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| PACS: |
52.70.Gw
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(Radio-frequency and microwave measurements)
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52.70.Ds
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(Electric and magnetic measurements)
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77.84.Lf
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(Composite materials)
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78.20.Ci
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(Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))
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| Fund: Supported by the National Natural Science Foundation of China under Grant No. 51972077, and the Heilongjiang Touyan Innovation Team Program. |
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