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

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DOIResolve DOI: http://doi.org/10.1063/1.4792669
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TypeArticle
Journal titleJournal of Applied Physics
ISSN0021-8979
Volume113
Issue8
Article number84312
SubjectDielectric behavior; Electromagnetic loss; Formation mechanism; Heterogeneous component; Heterogeneous cores; Metal nanostructure; Microwave absorption; Tunable components; Chemical vapor deposition; Nanocapsules; Thermodynamics; Electric discharges
AbstractExisting 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.
Publication date
LanguageEnglish
AffiliationAerospace; National Research Council Canada
Peer reviewedYes
NPARC number21270466
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Record identifier8d15b618-6c32-4af0-ac10-ba7fa982d5c4
Record created2014-02-12
Record modified2017-03-23
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