 This research focused on developing a new type of electromagnetic absorber composed of Fe and TiO2 nanoparticles sandwiched between two dimensional carbon nanosheets. The resulting material was able to absorb electromagnetic waves over a wide frequency range while maintaining low reflection losses. This could be used to reduce electromagnetic interference in electronic devices or other applications where electromagnetic shielding is needed. This article was authored by Bai Wendeng, Zhen Xiang, Wan Xiong, and others.