Core/shell metal/heterogeneous oxide nanocapsules: the empirical formation law and tunable electromagnetic losses

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DOIResolve DOI: http://doi.org/10.1021/jp4015417
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TypeArticle
Journal titleThe Journal of Physical Chemistry C
ISSN1932-7447
Volume117
Issue16
Pages85638569; # of pages: 7
SubjectArc discharge; Dielectric oxides; Dielectric shells; Electromagnetic loss; Frequency ranges; Interfacial couplings; Magnetic metals; Oxide powder; Electromagnetism; Nanocapsules; Powder metals; Electric discharges
AbstractWe report an empirical thermodynamic law for the synthesis of core/shell metal/heterogeneous oxide nanocapsules, such as Fe/SiO2, Ni/SiO 2, Fe/B2O3, Ni/B2O3, Fe/Al2O3, Fe/MnO2, Fe/Y2O 3, Fe/CeO2, and Fe/La2O3, by arc-discharge evaporating a compressed mixture of Fe (or Ni) powders and the oxide powders of shell components. By integrating such dielectric oxide shells and magnetic metal cores in each particle, the electromagnetic losses can be artificially manipulated at the whole S-band, C-band, X-band, and Ku frequency ranges. The microscopic origins of the controllability of electromagnetic losses are ascribed to the specific matching and interfacial coupling between the magnetic cores and dielectric shells.
Publication date
LanguageEnglish
AffiliationMedical Devices; National Research Council Canada
Peer reviewedYes
NPARC number21270510
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Record identifierfddbc45b-efae-4acc-9717-f06376880caa
Record created2014-02-14
Record modified2017-03-23
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