Interfacial electronic heterostructure engineering of cobalt boride nanosheets toward broadband efficient electromagnetic absorption

Herein, we report a novel 2D nanosheets-like heterostructure constructed by a molten salt-assisted dissolution-growth strategy and linked via strong interfacial electronic interactions, namely, cobalt boride (CoB) with boron, nitrogen co-doped carbon (CoB/BNC). The minimum reflection loss of −70.76 dB and effective absorption bandwidth of 4.72 GHz are simultaneously accomplished for CoB/BNC at the thickness of 3.48 mm.