Hydrothermal synthesis of nitrogen-doped graphene as lightweight and high-efficient electromagnetic wave absorbers
| Autor: | Hongna Xing, Zhenhua Shi, Shuai Chang, Xinghua Li, Wei Feng, Yan Zong, Xinliang Zheng, Xiuhong Zhu, Juan Feng, You Zhou |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
business.industry Graphene Reflection loss Dielectric Dissipation Condensed Matter Physics Polarization (waves) Electromagnetic radiation Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention law Miniaturization Optoelectronics Dielectric loss Electrical and Electronic Engineering business |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 32:26116-26125 |
| ISSN: | 1573-482X 0957-4522 |
| DOI: | 10.1007/s10854-021-06340-4 |
| Popis: | Exploring lightweight electromagnetic wave absorption materials is urgently needed to satisfy the miniaturization and integration of artificial intelligence and 5G technologies. Herein, nitrogen-doped graphene (N-GN) is successfully fabricated through a simple hydrothermal method, which can float in the water. Except for keeping the sheet-like structure of GO, nitrogen-doped graphene shows a reticular-like structure with more wrinkles and crinkles, which is crossed and interconnected to each other. The introduced nitrogen heteroatoms may induce dipole polarization, and the special interconnected reticular-like structure may improve the energy dissipation capacity. These features make nitrogen-doped graphene process improved dielectric loss and enhanced electromagnetic wave absorption performance. When the mass fraction of N-GN is only 10 wt%, N-GN shows a maximum reflection loss value of − 21.7 dB at 14.3 GHz with an absorber thickness of only 1.78 mm. This work indicates that nitrogen-doped graphene is a good candidate of lightweight dielectric materials. |
| Databáze: | OpenAIRE |
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