A method for manufacturing monocrystalline graphene, includes supplying an aromatic carbon gas onto a single-crystalline metal catalyst to manufacture the monocrystalline graphene.

A method for manufacturing monocrystalline graphene, includes supplying an aromatic carbon gas onto a single-crystalline metal catalyst to manufacture the monocrystalline graphene.

In some embodiments, the present disclosure pertains to methods of forming single-crystal graphenes by: (1) cleaning a surface of a catalyst; (2) annealing the surface of the catalyst; (3) applying a carbon source to the surface of the catalyst; and (4) growing single-crystal graphene on the surface of the catalyst from the carbon source. Further embodiments of the present disclosure also include a step of separating the formed single-crystal graphene from the surface of the catalyst. In some embodiments, the methods of the present disclosure also include a step of transferring the formed single-crystal graphene to a substrate. Additional embodiments of the present disclosure also include a step of growing stacks of single crystals of graphene.

Described are processes for making graphene pellet (GP) with a three-dimensional structure. The process includes forming a nickel pellet from nickel powder to function as a catalyst for graphene growth, exposing the nickel pellet to a hydrocarbon under conditions sufficient to grow graphene, and etching nickel from graphene with an acid resulting in a graphene pellet. Also described is a process for making a graphene paper from the graphene pellet comprising applying a compression force to the graphene pellet sufficient to compress the pellet. Also described is a method for forming a graphene pellet composite useful as an electrode.

Described are processes for making graphene pellet (GP) with a three-dimensional structure. The process includes forming a nickel pellet from nickel powder to function as a catalyst for graphene growth, exposing the nickel pellet to a hydrocarbon under conditions sufficient to grow graphene, and etching nickel from graphene with an acid resulting in a graphene pellet. Also described is a process for making a graphene paper from the graphene pellet comprising applying a compression force to the graphene pellet sufficient to compress the pellet. Also described is a method for forming a graphene pellet composite useful as an electrode.

Systems and method for producing graphene on a substrate are described. Certain types of exemplar systems include lateral arrangements of a substrate gas scavenging environment and an annealing environment. Certain other types of exemplar systems include lateral arrangements of a graphene producing environment and a cooling environment, which cools the graphene produced on the substrate. Yet other types of exemplar systems include lateral arrangements of a localized annealing environment, localized graphene producing environment and a localized cooling environment inside the same enclosure.

Certain type of exemplar methods for producing graphene on a substrate include scavenging a first portion of the substrate and preferably, contemporaneously annealing a second portion of the substrate. Certain other type of exemplar methods for producing graphene include novel annealing techniques and/or implementing temperature profiles and gas flow rate profiles that vary as a function of lateral distance and/or cooling graphene after producing it.

Provided herein are processes for transferring high quality large-area graphene layers (e.g., single-layer graphene) to a flexible substrate based on preferential adhesion of certain thin metallic films to graphene followed by lamination of the metallized graphene layers to a flexible target substrate in a process that is compatible with roll-to-roll manufacturing, providing an environmentally benign and scalable process of transferring graphene to flexible substrates.

A system and method for producing graphene includes a discharge assembly and a substrate assembly. The discharge assembly includes a cathode and an anode, which in one embodiment are offset from each other. The anode produces a flux stream that is deposited onto a substrate. A collection device removes the deposited material from the rotating substrate. The flux stream can be a carbon vapor, with the deposited flux being graphene.

The invention concerns a method of forming a graphene device, the method comprising: forming a graphene film (100) over a substrate; depositing, by gas phase deposition, a polymer material covering a surface of the graphene film (100); and removing the substrate from the graphene film (100), wherein the polymer material forms a support (102) for the graphene film (100).

The invention concerns a method of forming a graphene device, the method comprising: forming a graphene film (100) over a substrate; depositing, by gas phase deposition, a polymer material covering a surface of the graphene film (100); and removing the substrate from the graphene film (100), wherein the polymer material forms a support (102) for the graphene film (100).