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Nano Research 2023, 16(2): 2611-2621 https://doi.org/10.1007/s12274-022-5263-9
Research Article | Issue | Published: 06 December 2022

Heterointerface engineering in hierarchical assembly of the Co/Co(OH)2@carbon nanosheets composites for wideband microwave absorption

Show Author's Information Yuhan Wu1,  Guodong Wang2,  Xixi Yuan1,  Gang Fang1,  Peng Li1( ),  Guangbin Ji1( )
College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Aerospace Research Institute of Material & Processing Technology, Beijing 100076, China
Keywords:
microwave absorption, hierarchical porous structure, interface engineering, wide bandwidth, absorption mechanism
Topics:
Amorphous carbon Nanostructured materials
Cite this article:
Wu Y, Wang G, Yuan X, et al. Heterointerface engineering in hierarchical assembly of the Co/Co(OH)2@carbon nanosheets composites for wideband microwave absorption. Nano Research, 2023, 16(2): 2611-2621. https://doi.org/10.1007/s12274-022-5263-9
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Abstract Full text Electronic supplementary material About this article

Heterogeneous interface engineering strategy is an effective method to optimize electromagnetic functional materials. However, the mechanism of heterogeneous interfaces on microwave absorption is still unclear. In this study, abundant heterointerfaces were customized in hierarchical structures via a collaborative strategy of lyophilization and hard templates. The impressive electromagnetic heterostructures and strong interfacial polarization were realized on the zero-dimensional (0D) hexagonal close- packed (hcp)-face-centered cubic (fcc) Co/two-dimensional (2D) Co(OH)2 nanosheets@three-dimensional (3D) porous carbon nanosheets (Co/Co(OH)2@PCN). By controlling the carbonization temperature, the electromagnetic parameters were further adjusted to broaden the effective absorption bandwidth (EAB). Accordingly, the EAB of these absorbers were almost greater than 6 GHz (covering the entire Ku-band) in the thickness range of 2.0–2.2 mm except the sample S-1.0-800. As far as to the S-0.8-700 achieved an EAB up to 7.1 GHz at 2.2 mm and the minimum reflection loss (RLmin) value was −25.8 dB. Moreover, in the far-field condition, the radar cross section (RCS) of S-0.8-700 can be reduced to 19.6 dB·m2. We believe that this work will stimulate interest in interface engineering and provide a direction for achieving efficient absorbing materials.


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Electronic supplementary material
About this article

Heterointerface engineering in hierarchical assembly of the Co/Co(OH)2@carbon nanosheets composites for wideband microwave absorption

Show Author's information Yuhan Wu1, Guodong Wang2, Xixi Yuan1, Gang Fang1, Peng Li1( ), Guangbin Ji1( )
College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Aerospace Research Institute of Material & Processing Technology, Beijing 100076, China

Abstract

Heterogeneous interface engineering strategy is an effective method to optimize electromagnetic functional materials. However, the mechanism of heterogeneous interfaces on microwave absorption is still unclear. In this study, abundant heterointerfaces were customized in hierarchical structures via a collaborative strategy of lyophilization and hard templates. The impressive electromagnetic heterostructures and strong interfacial polarization were realized on the zero-dimensional (0D) hexagonal close- packed (hcp)-face-centered cubic (fcc) Co/two-dimensional (2D) Co(OH)2 nanosheets@three-dimensional (3D) porous carbon nanosheets (Co/Co(OH)2@PCN). By controlling the carbonization temperature, the electromagnetic parameters were further adjusted to broaden the effective absorption bandwidth (EAB). Accordingly, the EAB of these absorbers were almost greater than 6 GHz (covering the entire Ku-band) in the thickness range of 2.0–2.2 mm except the sample S-1.0-800. As far as to the S-0.8-700 achieved an EAB up to 7.1 GHz at 2.2 mm and the minimum reflection loss (RLmin) value was −25.8 dB. Moreover, in the far-field condition, the radar cross section (RCS) of S-0.8-700 can be reduced to 19.6 dB·m2. We believe that this work will stimulate interest in interface engineering and provide a direction for achieving efficient absorbing materials.

Keywords: microwave absorption, hierarchical porous structure, interface engineering, wide bandwidth, absorption mechanism

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Publication history
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Acknowledgements

Publication history

Received: 14 October 2022
Revised: 27 October 2022
Accepted: 28 October 2022
Published: 06 December 2022
Issue date: February 2023

Copyright

© Tsinghua University Press 2022

Acknowledgements

Acknowledgements

This work was supported by the National Natural Science Foundation of China (Nos. 51971111 and 52273247) and the Fund of Prospective Layout of Scientific Research for NUAA (Nanjing University of Aeronautics and Astronautics) (No. ILA220461A22).

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