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http://hdl.handle.net/10397/65991
Title: | Ag3PO4 nanoparticle-decorated Ni/C nanocapsules with tunable electromagnetic absorption properties | Authors: | Cui, C Zhou, P Liu, X Or, SW Ho, SL |
Issue Date: | 2017 | Source: | AIP advances, 2017, v. 7, no. 5, 56421, p. 056421-1-056421-7 | Abstract: | Core/shell-structured nickel/carbon (Ni/C) nanocapsules with Ag3PO4 nanoparticle decoration (Ag3PO4@Ni/C) are prepared by an arc-discharge process and an ion-exchange process. The Ag3PO4@Ni/C nanocapsules show a clear decoration of Ag3PO4 nanoparticles of 4-20 nm diameter on the C shell of the Ni/C nanocapsules of ∼60 nm diameter. The amount of Ag3PO4 nanoparticles that can be decorated on the Ni/C nanocapsules depends on the volume of Na2HPO4 reactant used in the ion-exchange process. The Ag3PO4@Ni/C nanocapsules demonstrate interestingly high and tunable electromagnetic absorption properties with different amounts of Ag3PO4 nanoparticle decoration in the paraffin-bonded composites over the 2-18 GHz microwave range. The nanocapsules prepared with 100 ml Na2HPO4 exhibit much enhanced dielectric and magnetic losses for an improved electromagnetic impedance match. These result in a large reflection loss (RL) of -31.4 dB at 12.3 GHz for a small absorber thickness of 2.6 mm in conjunction with a very wide effective absorption bandwidth (for RL<-10 dB) of 14 GHz (4-18 GHz) at a wide absorber thickness range of 1.4-5.0 mm. | Publisher: | American Institute of Physics | Journal: | AIP advances | EISSN: | 2158-3226 | DOI: | 10.1063/1.4975053 | Rights: | © 2017 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). The following publication C. Cui et al., AIP Advances 7, 56421 (2017) is available at https://dx.doi.org/10.1063/1.4975053 |
Appears in Collections: | Journal/Magazine Article |
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Cui_Ag3PO4_Nanoparticle-decorated_Nanocapsules.pdf | 5.6 MB | Adobe PDF | View/Open |
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