Excellent Terahertz shielding performance of ultrathin flexible Cu/graphene nanolayered composites with high stability  

作　　者：Shengyue Hou Wenle Ma Guanghao Li Yi Zhang Yunyun Ji Fei Fan Yi Huang 

机构地区：[1]National Institute for Advanced Materials,Tianjin Key Laboratory of Metal and Molecule Based Material Chemistry,Key Laboratory of Functional Polymer Materials,Collaborative Innovation Center of Chemical Science and Engineering(Tianjin),School of Materials Science and Engineering,Nankai University,Tianjin 300350,China [2]Beijing Institute of Aeronautical Materials,Beijing 100095,China [3]Institute of Modern Optics,Nankai University,Tianjin 300350,China

出　　处：《Journal of Materials Science & Technology》2020年第17期136-144,共9页材料科学技术（英文版）

基　　金：supported financially by the Foundation of Ministry of Science and Technology of China(No.2016YFA0200200);the National Natural Science Foundation of China(Nos.21875114,51373078 and 51422304);111 Project(No.B18030)。

摘　　要：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 nanolayered 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 stability have a broad application prospect in THz shielding for wearable devices and next generation mobile communication equipment.

关 键 词：Terahertz shielding Ultrathin flexible Cu/grapheme nano composites High stability 

分 类 号：TB333[一般工业技术—材料科学与工程]