1. Optimal electromagnetic-wave absorption by enhanced dipole polarization in Ni/C nanocapsules.
- Author
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Wang, Han, Guo, Huaihong, Dai, Yingying, Geng, Dianyu, Han, Zheng, Li, Da, Yang, Teng, Ma, Song, Liu, Wei, and Zhang, Zhidong
- Subjects
- *
ELECTROMAGNETIC waves , *ABSORPTION , *POLARIZATION (Nuclear physics) , *NANOCAPSULES , *DIPOLE moments - Abstract
Electromagnetic-wave (EMW) absorption by Ni/C nanocapsules with similar permeability but different permittivity mainly due to differences in the graphite-shell thickness has been investigated. The optimal working frequency could appear at S-band and C-band and considerable strong EMW absorption was achieved. For the optimal Ni/C nanocapsules, a reflection loss exceeding -20 dB was reached from 2.6 to 8.2 GHz with a maximum value of -40 dB at 3 GHz. The improved absorption can be attributed to an optimal electromagnetic match and an enhanced dipole polarization upon increasing of shell thickness. [ABSTRACT FROM AUTHOR]
- Published
- 2012
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