| Autor: |
Hong-Jun Xiao, Wei-Qi Yu, Hai-Tao Yang, Yi-Chen Qiu, Ge-Ming Wang |
| Rok vydání: |
2019 |
| Předmět: |
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| Zdroj: |
Chinese Physics B. 28:108103 |
| ISSN: |
1674-1056 |
| DOI: |
10.1088/1674-1056/ab4041 |
| Popis: |
Large-area and flexible reduced graphene oxide (rGO)/Fe3O4 NPs/polyurethane (PU) composite films are fabricated by a facile solution-processable method. The monolayer assembly of Fe3O4 nanoparticles with a high particle-stacking density on the graphene oxide (GO) sheets is achieved by mixing two immiscible solutions of Fe3O4 nanoparticles in hexane and GO in dimethylformide (DMF) by a mild sonication. The x-ray diffraction and Raman spectrum confirm the reduced process of rGO by a simple thermal treatment. The permittivity value of the composite in a frequency range of 0.1 GHz–18 GHz increases with annealing temperature of GO increasing. For 5-wt% rGO/Fe3O4 NPs/PU, the maximum refection loss (RL) of over −35 dB appears at 4.5 GHz when the thickness of film increases to 5 mm. The rGO/Fe3O4 NPs/PU film, exhibiting good electromagnetic properties over GHz frequency range, could be a potential candidate as one of microwave absorption materials in flexible electronic devices. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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