▎ 摘　　要

NOVELTY - A device having a layered structure comprises the first ferroelectric polymer layer (2) between a protective layer (1) and a first graphene layer (3); second ferroelectric polymer layer (4) between the first graphene layer and the second graphene layer (5); second graphene layer between the second ferroelectric polymer layer and third ferroelectric polymer layer (6); and third ferroelectric polymer layer between the second graphene layer and the substrate layer (7), where the graphene layer is single layer graphene or multi-layer graphene. USE - As touch screen such as resistive touch screen and self-capacitance touch screen (claimed). The layered graphene-ferroelectric structures are used as transparent electrodes in touch panels and display screen applications. ADVANTAGE - The layered graphene-ferroelectric polymer structure provides a lower sheet resistance. The layered graphene-ferroelectric polymer structure has excellent flexibility, foldability and stretchability. The advantages of using ferroelectric polymers include decreasing the sheet resistance of graphene, providing transparency (greater than about 80%, up to 95%), and yielding non-volatile electric dipoles. Ferroelectric polymers also assist in the binding of the various layers of the layered graphene-ferroelectric polymer structure. The ferroelectric polymers exhibit piezoelectricity allowing generation of voltage upon pressing of the ferroelectric polymer that can be utilized to power mobile devices and/or sense the touch. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for fabricating a device having a layered structure involving: a) depositing a layer of graphene onto a template by template-directed chemical vapor deposition (CVD) to form a first graphene layer; b) optionally patterning the first graphene layer; c) coating the first graphene layer with a ferroelectric polymer layer to form a first graphene-based electrode; d) heating the first graphene-based electrode to 100-200 degrees C; e) removing the template via wet chemical etching; f) optionally polarizing the ferroelectric polymer layer of the first graphene-based electrode to form a first graphene-based electrode array; g) depositing a layer of graphene onto a template by template-directed chemical vapor deposition (CVD) to form a second graphene layer; h) optionally patterning the second graphene layer; i) coating the second graphene layer with a ferroelectric polymer layer to form a second graphene-based electrode; j) heating the second graphene-based electrode 100-200 degrees C; k) removing the template via wet chemical etching; l) polarizing the ferroelectric polymer layer of the second graphene-based electrode to form a second graphene-based electrode array; and m) placing the first graphene-based electrode on top of the second graphene-based electrode such that the first graphene layer of the first graphene-based electrode faces and is in direct contact with the ferroelectric polymer layer of the second graphene-based electrode. DESCRIPTION OF DRAWING(S) - The figure shows schematic diagram of a mutual capacitance layered graphene-ferroelectric polymer touch screen and a first and second graphene layer patterned in an X-Y interlocking diamond structure. Protective layer (1) First ferroelectric polymer layer (2) First graphene layer (3) Second ferroelectric polymer layer (4) Second graphene layer (5) third ferroelectric polymer layer (6) Substrate layer (7)