Graphene Epoxy-Based Composites as Efficient Electromagnetic Absorbers in the Extremely High-Frequency Band

• DOI: 10.1021/acsami.0c06729
• Publication Date: 2020-06-01T09:37:09Z
• Authors: Zahra Barani; Fariborz Kargar; Konrad Godziszewski; Adil Rehman; Yevhen Yashchyshyn; Sergey Rumyantsev; Grzegorz Cywiński; Wojciech Knap; Alexander A. Bala...
• Keywords: Frequency band

We report on the synthesis of epoxy-based composites with graphene fillers and test their electromagnetic shielding efficiency by quasi-optic free-space method in extremely high-frequency (EHF) band (220-325 GHz). The curing adhesive were produced a scalable technique mixture single-layer few-layer layers few-micrometer lateral dimensions. It was found that transmission, T, is low even at small concentrations fillers: T<1% frequency 300 GHz for composite only ϕ = 1 wt% graphene. main mechanism loading absorption. mm thickness 8 provide an excellent 70 dB sub-terahertz EHF negligible energy reflection to environment. developed lightweight can be used as absorbers microwave radio relays, remote sensors, millimeter wave scanners, wireless local area networks.