Interface Polarization Strategy to Solve Electromagnetic Wave Interference Issue

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• 作者：Hualiang Lv ; Yuhang Guo ; Guanglei Wu ; Guangbin JiYue Zhao ; Zhichuan J. Xu
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2017
• 出版时间：February 15, 2017
• 年：2017
• 卷：9
• 期：6
• 页码：5660-5668
• 全文大小：777K
• ISSN：1944-8252

文摘

Design of an interface to arouse interface polarization is an efficient route to attenuate high-frequency electromagnetic waves. The attenuation intensity is highly related to the contact area. To achieve stronger interface polarization, growing metal oxide granular film on graphene with a larger surface area seems to be an efficient strategy due to the high charge carrier concentration of graphene. This study is devoted to fabricating the filmlike composite by a facile thermal decomposition method and investigating the relationship among contact area, polarization intensity, and the type of metal oxide. Because of the high-frequency polarization effect, the composites presented excellent electromagnetic wave attenuation ability. It is shown that the optimal effective frequency bandwidth of graphene/metal oxide was close to 7.0 GHz at a thin coating layer of 2.0 mm. The corresponding reflection loss value was nearly −22.1 dB. Considering the attenuation mechanism, interface polarization may play a key role in the microwave-absorbing ability.