Electromagnetic response of magnetic graphene hybrid fillers and their evolutionary behaviors
| Autor: | Hui Dong Hu, Chan-Yuan Wang, Xingming Bian, Zhi Sheng Li, Xu Zhang, Xin Qi, Zhi-Ling Hou, Lin Liu |
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| Rok vydání: | 2015 |
| Předmět: |
Permittivity
Materials science Graphene Nanotechnology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials law.invention law Electrical resistivity and conductivity Electromagnetic shielding Electrical and Electronic Engineering Composite material 0210 nano-technology Hybrid material Polarization (electrochemistry) Absorption (electromagnetic radiation) Microwave |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 27:2760-2772 |
| ISSN: | 1573-482X 0957-4522 |
| DOI: | 10.1007/s10854-015-4088-7 |
| Popis: | To understand the principles and mechanisms of the graphene-based electromagnetic response composites, we prepare magnetic graphene–Fe3O4 (G–F) hybrid materials and study the electromagnetic properties in the frequency region of 2–18 GHz. The introduction of Fe3O4 nanoparticles is found to play a dominant role in the complex permittivity, resulting in changing the surface polarization and interfacial resistivity of the graphene-based fillers. These influences have been found to greatly impact the corresponding microwave absorption and electromagnetic shielding performance. Owing to the syngeneic effects of G and Fe3O4, the wax-based composites with G–F presented effective microwave absorption ( 20 dB) in the investigated region. The associated mechanisms based on tuning the electromagnetic response of the graphene-based composites via the unique Fe3O4 interfaces have been intensively discussed, which promises great guidance in rationally designing and fabricating advanced graphene-based electromagnetic response materials. |
| Databáze: | OpenAIRE |
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