Journal
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
Volume 27, Issue 3, Pages 2760-2772Publisher
SPRINGER
DOI: 10.1007/s10854-015-4088-7
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Funding
- National Natural Science Foundation of China [51377096, 51102007]
- China Postdoctoral Science Foundation [2014M560934]
- Chinese Ministry of Education [313007]
- Fundamental Research Funds for the Central Universities [2015QN16]
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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 (<-10 dB) and sufficient electromagnetic shielding performance (>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.
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