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论文类型：期刊论文

发表时间：2013-02-28

发表刊物：JOURNAL OF APPLIED PHYSICS

收录刊物：EI、SCIE

卷号：113

期号：8

ISSN号：0021-8979

摘要：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]