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所属单位：材料科学与技术学院

发表刊物：ACS APPLIED MATERIALS & INTERFACES

关键字：interface polarization metal oxide granular film electromagnetic interference effective absorption frequency contact area

摘要：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.

ISSN号：1944-8244

是否译文：否

发表时间：2017-02-15

合写作者：吕华良,郭玉行,吴广磊,赵越,徐梽川

通讯作者：姬广斌,徐梽川,姬广斌