Design of Multilayered 2D Nanomaterial Composite Structures for EMI Shielding Analysis

It is still very challenging to effectively design nanocomposite microstructures with significantly improved electromagnetic interference shielding effectiveness (EMI SE). Herein, we developed a facile method for fabrication of molybdenum disulfide/graphene nanoplatelets (MoS2/GNPs) nanocomposites, in which GNPs are utilized as highly effective electrical transport materials, while MoS2 resolves the agglomeration problem of GNPs. GNPs also serve as an efficient cluster of electrical transport systems and dampen the incoming electromagnetic wave. Two types of samples are synthesized and compared in context of EMI SE values: physically mixed composite and layered samples. The sandwiched MoS2 between GNP layers showed an EMI SE of similar to 24 dB, which was an almost 14% improvement relative to MoS2/GNPs nanocomposites exhibiting an EMI SE value of similar to 21 dB, both containing 0.5 wt % GNPs. This work provides a new strategy for the design of multifunctional nanocomposites using the simple low-cost vacuum filtration method for EMI shielding for future applications.

Automated summary

This study successfully fabricated molybdenum disulfide/graphene nanoplatelets (MoS2/GNPs) nanocomposites using a simple and low-cost vacuum filtration method. The comparison between two synthesis methods showed that the sandwiched structure exhibited better electromagnetic interference shielding effectiveness (EMI SE).