Researchers from Taiwan's National Cheng Kung University developed a new low-cost and scalable method to pattern graphene on 3D surfaces. This could enable the use of graphene conductors on flexible or curved substrates. Researchers from Notherwestern University now seek to extend this work by producing complete circuits on curved surfaces.
The method starts by ink-jet printing a layer of aluminum chloride on a copper foil. This pattern is used as a template for graphene CVD growth. In the next step, a polymer membrane is added which supports the graphene when the aluminum chloride is removed. The graphene can be transferred to the desired surface.