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 ∼24 dB, which was an almost 14% improvement relative to MoS₂/GNPs nanocomposites exhibiting an EMI SE value of ∼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.