Hits:

Indexed by:期刊论文

Date of Publication:2013-02-28

Journal:JOURNAL OF APPLIED PHYSICS

Included Journals:SCIE、EI

Volume:113

Issue:8

ISSN No.:0021-8979

Abstract: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. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4792669]