Abstract
MXene, the new family of two-dimensional materials having numerous nanoscale layers, is being considered as a novel microwave absorption material. However, MXene/functionalized MXene-loaded polymer nanocomposites exhibit narrow reflection loss (RL) bandwidth (RL less than or equal to −10 dB). In order to enhance the microwave absorption bandwidth of MXene hybrid-matrix materials, for the first time, macroscopic design approach is carried out for TiO2-Ti3C2Tx MXene and Fe3O4@TiO2-Ti3C2Tx MXene hybrids through simulation. The simulated results indicate that use of pyramidal meta structure of MXene can significantly tune the RL bandwidth. For optimized MXene hybrid-matrix materials pyramid pattern, the bandwidth enhances to 3–18 GHz. Experimental RL value well matched with the simulated RL. On the other hand, the optimized Fe3O4@TiO2-Ti3C2Tx hybrid exhibits two specific absorption bandwidths (minimum RL value - −47 dB). Compared with other two-dimensional nanocomposites such as graphene or Fe3O4-graphene, MXene hybrid-matrix materials show better microwave absorption bandwidth in macroscopic pattern.
Highlights
In the recent years, the cutting-edge telecommunication, healthcare systems, detective systems, military applications, etc., predominantly use microwave frequency [1,2,3,4,5,6,7]
MXene has been noted by the scientific community in the last 8 years for its unique structure and electrical properties [12,13,14]
It is clear that single-layer MXene composites possess excellent reflection loss (RL), but very narrow bandwidth
Summary
The cutting-edge telecommunication, healthcare systems, detective systems, military applications, etc., predominantly use microwave frequency [1,2,3,4,5,6,7]. Polymer-based EMI absorbers using different fillers such as conducting and magnetic nanoparticles are not capable of offering high broadband microwave absorption as a single layer because of low impedance match and quarter wavelength resonance [10]. It should be noted that for better microwave absorption the combination of moderate conductivity and magnetic-dielectric system has benefits because of its impedance matching and high electromagnetic energy loss. It can be considered as an effective approach for enhanced microwave absorption property of MXene. The macroscopic design of MXene nanocomposites for enhanced bandwidth has not been reported. We have designed a macroscopic structure of MXene nanocomposites based on impedance matching, simulated the RL and investigated the RL bandwidth advantage
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