| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Atomically Dispersed Ni Single-Atoms Anchored on N-Doped Graphene Aerogels for Highly Efficient Electromagnetic Wave Absorption |
| Bing Suo, Xiao Zhang*, Xinyu Jiang, Feng Yan*, Zhengzhi Luo, and Yujin Chen* |
| Key Laboratory of In-Fiber Integrated Optics (Ministry of Education), and College of Physics and Optoelectronic Engineering, Harbin Engineering University, Harbin 150001, China |
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| Cite this article: |
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Bing Suo, Xiao Zhang, Xinyu Jiang et al 2022 Chin. Phys. Lett. 39 045201 |
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Abstract Uniformly dispersed nickel single atoms (SAs) are experimentally prepared on ultralight N-doped graphene aerogels (Ni-SA@NRGA). The experimental results show that Ni-SAs in graphene aerogels can improve the conduction, polarization losses, and impedance matching properties of the Ni-SA@NRGA. As a result, the minimum reflection loss ($R_{\rm L,min}$) of Ni-SA@NRGA is $-$49.46 dB with a matching thickness of 2.0 mm and the broadest efficient absorption bandwidth is 3.12 GHz at a low thickness of 1.5 mm. Meanwhile, even with a matching thickness of 1.2–2.0 mm, the $R_{\rm L,min}$ value of Ni-SA@NRGA can reach $-$20 dB. The current study demonstrates the significance of incorporating metal single atoms into graphene aerogel for electromagnetic wave absorption.
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Received: 15 December 2021
Published: 28 March 2022
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| PACS: |
52.70.Gw
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(Radio-frequency and microwave measurements)
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52.70.Ds
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(Electric and magnetic measurements)
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77.84.Lf
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(Composite materials)
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78.20.Ci
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(Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))
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