Synthesis and electromagnetic properties of Al/AlOx-coated Ni nanocapsules

Xianguo Liu; Chao Feng; Siu Wing Or; Chuangui Jin; Feng Xiao; Ailin Xia; Weihuo Li; Yuping Sun; Shengsheng Zhao

doi:10.1016/j.materresbull.2013.05.110

Synthesis and electromagnetic properties of Al/AlO_x-coated Ni nanocapsules

Xianguo Liu, Chao Feng, Siu Wing Or, Chuangui Jin, Feng Xiao, Ailin Xia, Weihuo Li, Yuping Sun, Shengsheng Zhao

The Hong Kong Polytechnic University

Research output: Journal article publication › Journal article › Academic research › peer-review

32 Citations (Scopus)

Abstract

Ni nanocapsules with a core of Ni nanoparticle and a shell of amorphous Al/AlOxhave been prepared by the arc discharge method. The natural resonance in the Al/AlOx-coated Ni nanocapsules shifts to 6.4 GHz, due to the surface anisotropy of Ni nanoparticles. An optimal RL value of -40.96 dB was observed at 9.2 GHz on a specimen with a matching thickness of 2.40 mm. Theoretical simulation for the microwave absorption using the transmission line theory agrees reasonably well with the experimental results. The frequency of microwave absorption complies with the quarter-wavelength matching model.

Original language	English
Pages (from-to)	3887-3891
Number of pages	5
Journal	Materials Research Bulletin
Volume	48
Issue number	10
DOIs	https://doi.org/10.1016/j.materresbull.2013.05.110
Publication status	Published - 1 Oct 2013

Keywords

A. Composites
A. Nanostructures
C. X-ray diffraction
D. Dielectric properties

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

More information

10.1016/j.materresbull.2013.05.110

Cite this

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title = "Synthesis and electromagnetic properties of Al/AlOx-coated Ni nanocapsules",

abstract = "Ni nanocapsules with a core of Ni nanoparticle and a shell of amorphous Al/AlOxhave been prepared by the arc discharge method. The natural resonance in the Al/AlOx-coated Ni nanocapsules shifts to 6.4 GHz, due to the surface anisotropy of Ni nanoparticles. An optimal RL value of -40.96 dB was observed at 9.2 GHz on a specimen with a matching thickness of 2.40 mm. Theoretical simulation for the microwave absorption using the transmission line theory agrees reasonably well with the experimental results. The frequency of microwave absorption complies with the quarter-wavelength matching model.",

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author = "Xianguo Liu and Chao Feng and Or, {Siu Wing} and Chuangui Jin and Feng Xiao and Ailin Xia and Weihuo Li and Yuping Sun and Shengsheng Zhao",

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AU - Liu, Xianguo

AU - Feng, Chao

AU - Or, Siu Wing

AU - Jin, Chuangui

AU - Xiao, Feng

AU - Xia, Ailin

AU - Li, Weihuo

AU - Sun, Yuping

AU - Zhao, Shengsheng

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AB - Ni nanocapsules with a core of Ni nanoparticle and a shell of amorphous Al/AlOxhave been prepared by the arc discharge method. The natural resonance in the Al/AlOx-coated Ni nanocapsules shifts to 6.4 GHz, due to the surface anisotropy of Ni nanoparticles. An optimal RL value of -40.96 dB was observed at 9.2 GHz on a specimen with a matching thickness of 2.40 mm. Theoretical simulation for the microwave absorption using the transmission line theory agrees reasonably well with the experimental results. The frequency of microwave absorption complies with the quarter-wavelength matching model.

KW - A. Composites

KW - A. Nanostructures

KW - C. X-ray diffraction

KW - D. Dielectric properties

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