【摘 要】
：
Electromagnetic interference (EMI) shielding at Terahertz (THz) frequency range attracts increasing attention due to the rapid development of THz science and te
【机 构】
：
National Institute for Advanced Materials,Tianjin Key Laboratory of Metal and Molecule Based Materia
论文部分内容阅读
Electromagnetic interference (EMI) shielding at Terahertz (THz) frequency range attracts increasing attention due to the rapid development of THz science and technologies.EMI shielding materials with small thickness,high shielding effectiveness (SE),good flexibility and stability are highly desirable.Herein,an ultrathin flexible copper/graphene (Cu/Gr) nanolayered composite are prepared,which can reach the average EMI SE of 60.95 dB at 0.1-1.0 THz with a thickness of only 160 nm,indicating that more than 99.9999％ of the THz wave power can be shielded.Furthermore,the Cu/Gr nanolayered composite also exhibits excellent oxidation resistance,with a 93.09％ maintenance rate for EMI SE value after heating at 120 ℃ for 3 h in air,far higher than that of the bare Cu film (62.15％).Besides,the Cu/Gr nanolay-ered composite exhibits good mechanical flexibility and flexural fatigue resistance.The EMI SE value of the Cu/Gr nanolayered composite shows a maintenance rate of 98.87％ even after 1500 times bending cycles,obviously higher than that of multilayer Cu film (93.07％).These results demonstrate that the ultrathin flexible Cu/Gr nanolayered composites with excellent shielding performance and good stabil-ity have a broad application prospect in THz shielding for wearable devices and next generation mobile communication equipment.
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