Dielectric behavior of single iron atoms dispersed on nitrogen-doped nanocarbon

Abstract

We report the enhanced dielectric properties of iron atomically dispersed on nanocarbon. Theoretical simulations and calculations based on the Havriliak-Negami model and the first principles demonstrate that the increased dielectric property can be explained by the increased electrical conductivity and dielectric relaxations caused by the introduction of single iron atoms. Nanocarbon with single iron atoms exhibited enhanced electromagnetic wave absorption properties and could be further improved when being coupled with reduced graphene oxide. Our findings open a way for exploring high-performance materials with single metal atoms for practical applications in electromagnetic fields.