Microwave-absorption properties of ZnO-coated iron nanocapsules
The electromagnetic (EM) characteristics of ZnO-coated Fe nanocapsules synthesized by arc discharging were studied at 2 - 18 GHz . A reflection loss (RL) exceeding − 20 dB was obtained in the frequency range of 6.1 - 15.7 GHz for an absorber thickness of 1.5 - 5 mm . An optimal RL of − 57.1 dB was f...
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| Veröffentlicht in: | Applied physics letters 2008-04, Vol.92 (17), p.173117-173117-3 |
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| Hauptverfasser: | , , , , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | The electromagnetic (EM) characteristics of ZnO-coated Fe nanocapsules synthesized by arc discharging were studied at
2
-
18
GHz
. A reflection loss (RL) exceeding
−
20
dB
was obtained in the frequency range of
6.1
-
15.7
GHz
for an absorber thickness of
1.5
-
5
mm
. An optimal RL of
−
57.1
dB
was found at
7.8
GHz
for an absorber thickness of
3.00
mm
. The excellent microwave-absorption properties are a consequence of a proper EM match in the nano-microstructure, a strong natural resonance, as well as multipolarization mechanisms. ZnO-coated Fe nanocapsules may be attractive candidates for EM-wave-absorption materials. |
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| ISSN: | 0003-6951 1077-3118 |
| DOI: | 10.1063/1.2919098 |