NOVELTY - Graphite-based device comprises a substrate comprising many zones, and at least one graphene stack (1002), where a first zone in the zones comprises many surfaces, a first surface (1006-1) is adjacent to a second surface (1006-2) in the surfaces in the first zone, the graphene stack comprise a first graphene stack formed in the first zone, the first graphene stack comprises many graphene layers, a first graphene layer (1004-1) in the graphene layers is formed on the first surface in the first zone, and the first graphene layer is either planar or non-planar.    USE - The graphite-based device is useful in conic devices that can interact with photons in resonance or variable wavelength ranges, solar cells that can track solar photons, reflection or concentration devices that can redirect or concentrate photons to a target region, and antenna arrays that can absorb or emit photons in specific wavelength ranges.    ADVANTAGE - The graphite-based device is configured to have large workable surface areas that surpass the underlying physical surface areas, and thus the additional workable surface areas absorb or emit photons, resulting in high packing density of the devices and enhanced functionalities of the devices such as efficiency of solar cells or photodetectors, utilizes the graphene stack which performs one function while another graphene stack performs a different function, and thus performs multiple functions, or and achieves multiple functions by a single graphene stack, with a graphene layer in the graphene stack performing one function while another graphene layer in the same graphene stack performing a different function, and exhibits high quality and integrity.    DETAILED DESCRIPTION - Graphite-based device comprises: a substrate comprising many zones; and at least one graphene stack (1002), where a first zone in the zones comprises many surfaces, a first surface (1006-1) is adjacent to a second surface (1006-2) in the surfaces in the first zone, the graphene stack comprise a first graphene stack formed in the first zone, the first graphene stack comprises many graphene layers, a first graphene layer (1004-1) in the graphene layers is formed on the first surface in the first zone, the first graphene layer is either planar or non-planar, a second graphene layer (1004-2) in the graphene layers comprises a first portion formed on a top surface of the first graphene layer, a second portion formed on the second surface in the first zone and a first intermediate portion connecting the first portion and the second portion of the second graphene layer, the second graphene layer is non-planar, and the first and second graphene layers have different characteristic dimensions and different band-gaps.    DESCRIPTION OF DRAWING(S) - The figure a schematic graphical representations of the graphite-based devices with the graphene stack having a graphene profile in variable configurations.    Graphene stack (1002)    First graphene layer (1004-1)    Second graphene layer (1004-2)    First surface (1006-1)    Second surface (1006-2)