Manipulated electromagnetic losses by integrating chemically heterogeneous components in Fe-based core/shell architecture

Existing techniques for stabilizing and functionalizing metal nanostructures required precise control of complex procedures and probably introduce undesirable impurities. We herein report an arc-discharge chemical vapor deposition strategy for the synthesis of chemically heterogeneous core/shell met...

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Veröffentlicht in:Journal of applied physics 2013-02, Vol.113 (8)
Hauptverfasser: Huang, Hao, Zhang, Xue-Feng, Lv, Bo, Xue, Fang-Hong, Shah, Asif, Su, Lei, Yan, Jing-Guo, Yao, Man, Dong, Xing-Long
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Sprache:eng
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Zusammenfassung:Existing techniques for stabilizing and functionalizing metal nanostructures required precise control of complex procedures and probably introduce undesirable impurities. We herein report an arc-discharge chemical vapor deposition strategy for the synthesis of chemically heterogeneous core/shell metal/oxide nanocapsules Fe/TiFe2O4, Fe/MnFe2O4, and Fe/Al2O3. A universal formation mechanism based on the co-effect of oxygen potential and surface energy is further proposed, derived from fundamental thermodynamics. Such core/shell nanocapsules, integrated with tunable components, present an effective manipulability of microwave absorption at expected frequency, originating from the various dielectric behaviors of the heterogeneous oxide shells.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4792669