Abstract
Twinned growth behaviour in the rapidly emerging area of two-dimensional nanomaterials still remains unexplored although it could be exploited to fabricate heterostructure and superlattice materials. Here we demonstrate how one can utilize the twinned growth relationship between two two-dimensional materials to construct vertically stacked heterostructures. As a demonstration, we achieve 100% overlap of the two transition metal dichalcogenide layers constituting a ReS2/WS2 vertical heterostructure. Moreover, the crystal size of the stacked structure is an order of magnitude larger than previous reports. Such twinned transition metal dichalcogenides vertical heterostructures exhibit great potential for use in optical, electronic and catalytic applications. The simplicity of the twinned growth can be utilized to expand the fabrication of other heterostructures or two-dimensional material superlattice and this strategy can be considered as an enabling technology for research in the emerging field of two-dimensional van der Waals heterostructures.
Highlights
Twinned growth behaviour in the rapidly emerging area of two-dimensional nanomaterials still remains unexplored it could be exploited to fabricate heterostructure and superlattice materials
Ajayan et al presented an approach for the chemical vapour deposition (CVD) synthesis of stacked WS2/MoS2 heterostructures, which showed the potential for larger scale production[21]
We achieve 100% overlap for each of the stacked TMDCs structures, with crystal sizes of the heterostructures one order of magnitude larger than previous reports[12,13,14,16,18,20,21,22,23,24,25,26]
Summary
Twinned growth behaviour in the rapidly emerging area of two-dimensional nanomaterials still remains unexplored it could be exploited to fabricate heterostructure and superlattice materials. We achieve 100% overlap of the two transition metal dichalcogenide layers constituting a ReS2/WS2 vertical heterostructure. The crystal size of the stacked structure is an order of magnitude larger than previous reports Such twinned transition metal dichalcogenides vertical heterostructures exhibit great potential for use in optical, electronic and catalytic applications. Vertically stacked heterostructures comprising multi-layered TMDCs were obtained by sequential mechanical exfoliation. We achieve 100% overlap for each of the stacked TMDCs structures, with crystal sizes of the heterostructures one order of magnitude larger than previous reports[12,13,14,16,18,20,21,22,23,24,25,26]. We believe that the developed approach will promote and accelerate ongoing research efforts of 2D crystalline van der Waals heterostructures
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