(School of Materials Science and Engineering, Anhui University of Technology,
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DOI:
10.7502/j.issn.1674-3962.2016.12.03
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Abstract:
Carbon-coated metallic nanocapsules have attracted much attention due to their tunable core/shell structure and complementary magnetic- and dielectric-loss properties which can lead to optimal microwave absorption properties. The carbon shells can not only improve physical and chemical properties of nanomaterials but also result in some new mechanisms that are contributing to electromagnetic impedance matching. In this paper, we described core/shell-type carbon-coated nanocapsules using a DC arc discharge approach and analyzed their formation mechanism. The architectural design of nanocapsules applied for microwave absorbing materials was introduced and reviewed, including research on nanocapsules with different core or shell dimensions and doped by some kinds of heteroatoms which are significant to adjust the dielectric and magnetic losses and the microwave properties of absorbers.