Tracking Regulatory Mechanism of Trace Fe on Graphene Electromagnetic Wave Absorption

Abstract Polarization and conductance losses are the fundamental dielectric attenuation mechanisms for graphene-based absorbers, but it is not fully understood in revealing the loss mechanism of affect graphene itself. For the first time, the reduced graphene oxide (RGO) based absorbers are developed with regulatory absorption properties and the absorption mechanism of RGO is mainly originated from the carrier injection behavior of trace metal Fe nanosheets on graphene. Accordingly, the minimum reflection loss (RL min ) of Fe/RGO-2 composite reaches − 53.38 dB (2.45 mm), and the effective absorption bandwidth achieves 7.52 GHz (2.62 mm) with lower filling loading of 2 wt%. Using off-axis electron hologram…

• NN
  National Natural Science Foundation of China

  Awards: 51672059, 51621091, 51772060, 52302087, 52372041, NSFC 52372041
• SA
  Shanghai Aerospace Science and Technology Innovation Foundation

  Award: SAST2022-60
• FR
  Fundamental Research Funds for the Central Universities