Ag3PO4 nanoparticle-decorated Ni/C nanocapsules with tunable electromagnetic absorption properties
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...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2017-05-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/1.4975053 |
| _version_ | 1819075761264394240 |
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| author | Caiyun Cui Pingping Zhou Xianguo Liu Siu Wing Or S. L. Ho |
| author_facet | Caiyun Cui Pingping Zhou Xianguo Liu Siu Wing Or S. L. Ho |
| author_sort | Caiyun Cui |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-21T18:30:33Z |
| format | Article |
| id | doaj.art-520178bc28df41418e7f4c9020621375 |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-12-21T18:30:33Z |
| publishDate | 2017-05-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-520178bc28df41418e7f4c90206213752022-12-21T18:54:18ZengAIP Publishing LLCAIP Advances2158-32262017-05-0175056421056421-710.1063/1.4975053169791ADVAg3PO4 nanoparticle-decorated Ni/C nanocapsules with tunable electromagnetic absorption propertiesCaiyun Cui0Pingping Zhou1Xianguo Liu2Siu Wing Or3S. L. Ho4School of Materials Science and Engineering, Anhui University of Technology, Maanshan 243002, People’s Republic of ChinaSchool of Materials Science and Engineering, Anhui University of Technology, Maanshan 243002, People’s Republic of ChinaSchool of Materials Science and Engineering, Anhui University of Technology, Maanshan 243002, People’s Republic of ChinaDepartment of Electrical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong KongDepartment of Electrical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong KongCore/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.http://dx.doi.org/10.1063/1.4975053 |
| spellingShingle | Caiyun Cui Pingping Zhou Xianguo Liu Siu Wing Or S. L. Ho Ag3PO4 nanoparticle-decorated Ni/C nanocapsules with tunable electromagnetic absorption properties AIP Advances |
| title | Ag3PO4 nanoparticle-decorated Ni/C nanocapsules with tunable electromagnetic absorption properties |
| title_full | Ag3PO4 nanoparticle-decorated Ni/C nanocapsules with tunable electromagnetic absorption properties |
| title_fullStr | Ag3PO4 nanoparticle-decorated Ni/C nanocapsules with tunable electromagnetic absorption properties |
| title_full_unstemmed | Ag3PO4 nanoparticle-decorated Ni/C nanocapsules with tunable electromagnetic absorption properties |
| title_short | Ag3PO4 nanoparticle-decorated Ni/C nanocapsules with tunable electromagnetic absorption properties |
| title_sort | ag3po4 nanoparticle decorated ni c nanocapsules with tunable electromagnetic absorption properties |
| url | http://dx.doi.org/10.1063/1.4975053 |
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