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
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.
收稿日期: 2021-12-15
出版日期: 2022-03-28
:
52.70.Gw
(Radio-frequency and microwave measurements)
52.70.Ds
(Electric and magnetic measurements)
77.84.Lf
(Composite materials)
78.20.Ci
(Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))
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2022, Vol. 39 
