Transfer-print of graphene, boron nitride and gold patterns onto polymeric materials

Two dimensional (2-D) materials such as graphene, hexagonal boron nitride (h-BN), black phosphorene (BP), molybdenum disulfide (MoS₂) have intriguing electrical, optical and chemical properties, which may enable next generation flexible sensors and photodetectors fabrication. However, placement of 2D materials on polymers to produce large scale 2D material/polymer heterostructures and the following metal deposition remains challenging. In this work, we show a multistep approach towards realization of 2D heterostructures on flexible substrates using a dry transfer-print approach based on differential adhesion. First, plasma treatment of the polymeric materials was performed. Then, organic molecular linker layer was attached for increased polymer adhesion. Then, the polymers and the 2D materials were placed in a nanoimprinter at specified conditions (pressure, temperature and time) and mechanically separated after print. Similarly, gold patterns were transferred to polymers. Optical, chemical, electrical and structural characterization of the samples before and after print was performed. Based on our results, we believe that our 2D material transfer-print approach will allow for large scale fabrication of the next generation 2D/flexible hybrid electronics devices.