Affiliation of Author(s):材料科学与技术学院
Journal:ACS APPLIED MATERIALS & INTERFACES
Key Words:interface polarization metal oxide granular film electromagnetic interference effective absorption frequency contact area
Abstract: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 No.:1944-8244
Translation or Not:no
Date of Publication:2017-02-15
Co-author:吕华良,郭玉行,吴广磊,zhaoyue,徐梽川
Correspondence Author:姬广斌,徐梽川,jiguangbin