Core/shell/shell-structured nickel/carbon/polyaniline nanocapsules with large absorbing bandwidth and absorber thickness range

被引：25

作者：

Liu, Xianguo ^{[1
]}

Or, Siu Wing ^{[1
]}

Leung, Chung Ming ^{[1
]}

Ho, S. L. ^{[1
]}

机构：

[1] Hong Kong Polytech Univ, Dept Elect Engn, Kowloon, Hong Kong, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2014年 / 115卷 / 17期

关键词：

MICROWAVE-ABSORPTION PROPERTIES; NI NANOCAPSULES; BAND;

D O I：

10.1063/1.4861581

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Core/shell/shell-structured nickel/carbon/polyaniline nanocapsules are prepared by a modified arc-discharge method and a chemical polymerization method, and their microwave absorbing properties are evaluated in the 2-18GHz range covering the full S-Ku bands of microwaves. The bandwidth-broadening effect in various core/shell/shell material phases of the nanocapsules leads to Debye-type multidielectric polarizations in complex permittivity, a broad magnetic natural resonance of 2-8GHz in complex permeability as well as extended absorbing bandwidth and absorber thickness range. A 3mm-thick paraffin-bonded nanocapsule absorber shows an optimal reflection loss (RL) of -9.3 dB at 6.2GHz with an extremely broad -5 dB-bandwidth of 3.4-18GHz in almost the whole S-Ku bands as well as a very large absorber thickness range of down to 1mm without deteriorating RL by 10%. (C) 2014 AIP Publishing LLC.

引用

页数：3

共 12 条

[1] Complex permittivity and microwave absorption properties of BaTiO3-polyaniline composite [J].

Abbas, SM ;

Dixit, AK ;

Chatterjee, R ;

Goel, TC .

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 2005, 123 (02) :167-171

[2] Enhanced microwave absorption in Ni/polyaniline nanocomposites by dual dielectric relaxations [J].

Dong, X. L. ;

Zhang, X. F. ;

Huang, H. ;

Zuo, F. .

APPLIED PHYSICS LETTERS, 2008, 92 (01)

[3] ON THE DISPERSION OF RESISTIVITY AND DIELECTRIC CONSTANT OF SOME SEMICONDUCTORS AT AUDIOFREQUENCIES [J].

KOOPS, CG .

PHYSICAL REVIEW, 1951, 83 (01) :121-124

[4] Dual nonlinear dielectric resonance and strong natural resonance in Ni/ZnO nanocapsules [J].

Liu, X. G. ;

Jiang, J. J. ;

Geng, D. Y. ;

Li, B. Q. ;

Han, Z. ;

Liu, W. ;

Zhang, Z. D. .

APPLIED PHYSICS LETTERS, 2009, 94 (05)

[5] (Fe, Ni)/C nanocapsules for electromagnetic-wave-absorber in the whole Ku-band [J].

Liu, X. G. ;

Li, B. ;

Geng, D. Y. ;

Cui, W. B. ;

Yang, F. ;

Xie, Z. G. ;

Kang, D. J. ;

Zhang, Z. D. .

CARBON, 2009, 47 (02) :470-474

[6] Synthesis and electromagnetic properties of Al/AlOx-coated Ni nanocapsules [J].

Liu, Xianguo ;

Feng, Chao ;

Or, Siu Wing ;

Jin, Chuangui ;

Xiao, Feng ;

Xia, Ailin ;

Li, Weihuo ;

Sun, Yuping ;

Zhao, Shengsheng .

MATERIALS RESEARCH BULLETIN, 2013, 48 (10) :3887-3891

[7] Investigation on microwave absorption properties of CuO/Cu2O-coated Ni nanocapsules as wide-band microwave absorbers [J].

Liu, Xianguo ;

Feng, Chao ;

Or, Siu Wing ;

Sun, Yuping ;

Jin, Chuangui ;

Li, Weihuo ;

Lv, Yaohui .

RSC ADVANCES, 2013, 3 (34) :14590-14594

[8] Preparation, characterization and microwave absorption properties of polyaniline/Co0.5Zn0.5Fe2O4 nanocomposite [J].

Ma, R. T. ;

Zhao, H. T. ;

Zhang, G. .

MATERIALS RESEARCH BULLETIN, 2010, 45 (09) :1064-1068

[9] Synthetic metals: a novel role for organic polymers [J].

MacDiarmid, AG .

SYNTHETIC METALS, 2001, 125 (01) :11-22

[10] Characterisation of carbon nano-onions using Raman spectroscopy [J].

Roy, D ;

Chhowalla, M ;

Wang, H ;

Sano, N ;

Alexandrou, I ;

Clyne, TW ;

Amaratunga, GAJ .

CHEMICAL PHYSICS LETTERS, 2003, 373 (1-2) :52-56

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