Nitrogen and Boron Co-Doped Carbon Nanotubes Embedded with Nickel Nanoparticles as Highly Efficient Electromagnetic Wave Absorbing Materials

Due to the limitations of impedance matching and attenuation matching,carbon nanotubes(CNTs) employed alone have a weak capacity to attenuate electromagnetic wave(EMW) energy.In this work,B and N co-doped CNTs with embedded Ni nanoparticles(Ni@BNCNTs) are fabricated via an in situ doping method.Compared with a sample without B doping,Ni@BNCNTs demonstrate a superior EMW absorption performance,with all minimum reflection loss values below-20 dB,even at a matching thickness of 1.5 mm.The experimental and theoretical calculation results demonstrate that B doping increases conduction and polarization relaxation losses,as well as the impedance matching characteristic,which is responsible for the enhanced EMW absorption performance of Ni@BNCNTs.