While the above setup can be feasible for stacking bilayers, it might not be directly applicable for bulk structures, as is the case in the structures predicted in the present work. Generally, the synthesis of hybrid 2DvdW bulk materials, or 2DvdW superlattices, is indeed more challenging than stacking 2DvdW bilayers. A range of techniques have been developed over the last decade, with reported success in making graphenebased bulk 2DvdW materials. The key experimental procedure that is established as the ideal synthesis approach is the electrostatic layer-by-layer (LbL) assembly. LbL assembly assumes that the two 2D layers have opposing electric polarisation, and the adsorption of the layers takes place in solution. Hence, it is not possible to control the strain of the constituent layers while in solution. There is a suite of alternative dry approaches for stacking or synthesising multilayers, as reviewed by Guo et al. A particularly promising approach is mechanical stacking. Using a micromanipulation platform, one layer is transferred onto the other, and then they are left to self-assemble by the van der Waals interlayer force. Once they self-assemble, the top layer is detached. If the two layers should have opposing strains, then the micromanipulation platform should strain each of the two layers: the bottom layer must be strained, and the top layer must be strained during transfer and up until it is detached. Once both layers are detached, they should remain at their strained configurations. If the top layer remains strained after detachment, then the process can be repeated by stacking more strained layers on top of the detached bilayer. Hence, this approach can be tested by experimentalists for testing the stacking of the FvdWHs predicted in this work.