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Research Article

Achieving excellent bandwidth absorption by a mirror growth process of magnetic porous polyhedron structures

Hualiang Lv1,3, Haiqian Zhang1, Jun Zhao2, Guangbin Ji1( ), Youwei Du4
College of Materials Science and TechnologyNanjing University of Aeronautics and AstronauticsNanjing211100China
School of Chemical and Biomedical EngineeringNanyang Technological UniversitySingapore637459Singapore
School of Materials Sciences and EngineeringNanyang Technological University, 50 Nanyang AvenueSingapore639798Singapore
National Laboratory of Solid State MicrostructuresNanjing UniversityNanjing210093China
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Graphical Abstract

Abstract

A symmetrical Fe2O3/BaCO3 hexagonal cone structure having a height of 10 μm and an edge length of ~4 μm is reported, obtained using a common solvothermal process and a mirror growth process. Focused ion beam and high-resolution transmission electron microscopy techniques revealed that α-Fe2O3 was the single crystal feature present. Ba ions contributed to the formation of symmetrical structures exhibited in the final composites. Subsequently, porous magnetic symmetric hexagonal cone structures were used to study the observed intense electromagnetic wave interference. Electromagnetic absorption performance studies at 2–18 GHz indicated stronger attenuation electromagnetic wave ability as compared to other shapes such as spindles, spheres, cubes, and rods. The maximum absorption frequency bandwidth was at 7.2 GHz with a coating thickness d = 1.5 mm. Special structures and the absence of BaCO3 likely played a vital role in the excellent electromagnetic absorption properties described in this research.

Keywords

symmetrical hexagonal cone structureFe2O3/BaCO3single crystalporous magnetic absorbereffective frequency bandwidth

Electronic Supplementary Material

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Nano Research
Volume 9 Issue 6,
June 2016
Pages 1813-1822
DOI: 10.1007/s12274-016-1074-1
Cite this article:
Lv H, Zhang H, Zhao J, et al. Achieving excellent bandwidth absorption by a mirror growth process of magnetic porous polyhedron structures. Nano Research, 2016, 9(6): 1813-1822. https://doi.org/10.1007/s12274-016-1074-1
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Received: 10 January 2016
Revised: 03 March 2016
Accepted: 16 March 2016
Published: 13 April 2016
© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2016
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