Abstract
Flexible and lightweight shielding materials recently have attracted increasing attention for terahertz wave due to the deteriorated performance of electronic equipment interferenced by electromagnetic yielding. Herein, flexible reduced graphene oxide (rGO) papers were prepared by solution evaporation method to attenuate the electromagnetic wave in terahertz field. They exhibited excellent electrical conductivity and remarkable electromagnetic interference shielding effectiveness. The electrical conductivity of the rGO papers was improved from 54.07 to 78.67 S/cm after annealing at 400 °C. The rGO paper annealed at 400 °C was only ~ 370 µm in thickness and particularly exhibited an outstanding absorption performance of 17.6 dB at 0.7 THz. It has been found that the maximum absorption performance of rGO papers was basically equivalent to that of the metamaterials. Moreover, electromagnetic interference shielding effectiveness of 72.1 dB of the rGO papers was obtained at 0.6 THz, which indicated that ~ 99.99% of the power was shielded. Thus, the flexible rGO papers maybe a promising candidate for optimized electromagnetic shielding materials in the terahertz band.
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Acknowledgements
This work was financially supported by the National Natural Science Foundation of China (Grants 61771327), NSAF (No. U1730138) and the Science and Technology Innovation Team of Sichuan Province (Grant 2015TD0003).
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Dong, S., Shi, Q., Huang, W. et al. Flexible reduced graphene oxide paper with excellent electromagnetic interference shielding for terahertz wave. J Mater Sci: Mater Electron 29, 17245–17253 (2018). https://doi.org/10.1007/s10854-018-9818-1
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DOI: https://doi.org/10.1007/s10854-018-9818-1