A process for exfoliating graphene, includes a step of irradiating a first substrate comprising graphene on its surface, with a helium or hydrogen plasma containing ions of energy comprised between 10 and 60 eV. A process for fabricating graphene on the surface of a second substrate, comprising the exfoliating process.

A method for synthesizing graphene sheets from carbon dioxide gas comprises percolating a gaseous carbon dioxide solution through an aqueous monoethanolamine solution at a low temperature, heating the aqueous monoethanolamine solution to release absorbed carbon dioxide, collecting the released carbon dioxide in a carbon dioxide collection chamber having magnesium metal element. The magnesium metal elements are ignited in the presence of carbon dioxide to form magnesium oxide and graphene flakes. The graphene flakes and magnesium oxide are washed with an aqueous hydrochloric acid solution to form magnesium chloride, water and graphene flakes, which are then separated. The graphene flakes are then exfoliated in an ammonium sulfate solution, separated from the ammonium sulfate solution, and tumbled in a tumble blender for several hours. Finally, graphene sheets are grown from the exfoliated flakes by immersing them in ethanol and applying a current. The graphene sheets are then separated from the ethanol and used in a variety of applications.

Described herein are hybrid nanomaterials that can include a functionalized nanodiamond and a functionalized graphene and/or functionalized graphene oxide. Also described herein are composite materials that can include a hybrid nanomaterial described herein and a polymer or polymeric material. Also described herein are methods of making and using the hybrid nanomaterials and composite materials described herein.

This invention pertains to the production of the bi-dimensional crystalline structure of carbon known as graphene. The purpose of this invention is to provide an aqueous, organic method for producing the atomic-scale substance. The invention is declared to enable the low-cost scalable production of large quantities of graphene.

A nanotube-graphene hybrid film and method for forming a cleaned nanotube-graphene hybrid film. The nanotube-graphene hybrid film includes a substrate; nanotube film deposited over the substrate to produce a layer of nanotube film; and graphene deposited over the layer of nanotube film to produce a nanotube-graphene hybrid film.

A method for synthesizing graphene sheets from carbon dioxide gas comprises percolating a gaseous carbon dioxide solution through an aqueous monoethanolamine solution at a low temperature, heating the aqueous monoethanolamine solution to release absorbed carbon dioxide, collecting the released carbon dioxide in a carbon dioxide collection chamber having magnesium metal element. The magnesium metal elements are ignited in the presence of carbon dioxide to form magnesium oxide and graphene flakes. The graphene flakes and magnesium oxide are washed with an aqueous hydrochloric acid solution to form magnesium chloride, water and graphene flakes, which are then separated. The graphene flakes are then exfoliated in an ammonium sulfate solution, separated from the ammonium sulfate solution, and tumbled in a tumble blender for several hours. Finally, graphene sheets are grown from the exfoliated flakes by immersing them in ethanol and applying a current. The graphene sheets are then separated from the ethanol and used in a variety of applications.

A process for exfoliating graphene, includes a step of irradiating a first substrate comprising graphene on its surface, with a helium or hydrogen plasma containing ions of energy comprised between 10 and 60 eV. A process for fabricating graphene on the surface of a second substrate, comprising the exfoliating process.

This invention pertains to the production of the bi-dimensional crystalline structure of carbon known as graphene. The purpose of this invention is to provide an aqueous, organic method for producing the atomic-scale substance. The invention is declared to enable the low-cost scalable production of large quantities of graphene.

Disclosed herein is a preparation method of graphene, capable of preparing graphene having a smaller thickness and a large area, and with reduced defect generation, by a simplified process. The preparation method of graphene includes forming dispersion including a carbon-based material including unoxidized graphite, and a dispersant; and continuously passing the dispersion through a high pressure homogenizer including an inlet, an outlet, and a micro-channel for connection between the inlet and the outlet, having a diameter in a micrometer scale, wherein the carbon-based material is exfoliated, as the material is passed through the micro-channel under application of a shear force, thereby forming graphene having a thickness in nanoscale.

A nanotube-graphene hybrid nano-component and method for forming a cleaned nanotube-graphene hybrid nano-component. The nanotube-graphene hybrid nano-component includes a gate; a gate dielectric formed on the gate; a channel comprising a carbon nanotube-graphene hybrid nano-component formed on the gate dielectric; a source formed over a first region of the carbon nanotube-graphene hybrid nano-component; and a drain formed over a second region of the carbon nanotube-graphene hybrid nano-component to form a field effect transistor.