Enhanced Electromagnetic Microwave Absorption Performance\nof Lightweight Bowl-like Carbon Nanoparticles

Abstract

Rational\nstructure design of microwave absorption material (MAM)\nis of fundamental significance in terms of enhancing the electromagnetic\nmicrowave absorption performance and deeply understanding the specific\ncorrelation between the material structure and its electromagnetic\nmicrowave absorption (EMA) performance. Here, bowl-like carbon nanoparticles\n(BLCNs) as novel MAM have been successfully fabricated via calcination\nof bowl-like polydopamine. Interestingly, BLCNs have exhibited dramatically\nenhanced EMA performance with a minimum reflection loss of −45.3\ndB and an effective bandwidth of below −10 dB in the wide range\nof 4.2 GHz, implying the unique critical role of the microstructure\nin adjusting the EMA performance. Our work not only paves an attractive\nway for the design of advanced and lightweight MAM, but also provides\nvaluable insights into the relationships between the material structure\nand its EMA performance.