Hybrid Transfer of 2D materials: An approach towards a wrinkle and contaminations free transfer of 2D materials grown on metallic substrates for van der Waals heterostructures and large scale industrial applications.

There has been much recent interest in transferring 2D materials on to non-conducting surfaces. One approach was to pick-up graphene grown by the CVD method using a flake of hexagonal boron nitride (hBN) to have a contamination-free dry transfer. [1] But this kind of transfer technique can be only used in small-scale device fabrication for laboratory use since the scale limitations of the hBN flakes and the limited supply of hBN flakes with low thicknesses. Here, we report a hybrid transfer technique that combines wet and dry transfer processes using polymer support resulting in wrinkle and contamination-free high mobility 2D materials. Thus, we detail the transfer process, conditions for a successful transfer and the quality of CVD grown graphene. The transferred graphene layers are characterized by various methods, and the results of the study are reported.

[1] L. Banszerus, M. Schmitz, S. Engels, J. Dauber, M. Oellers, F. Haupt, K. Watanabe, T. Taniguchi, B. Beschoten, and C. Stampfer, Science Advances 1, (2015).