Substrate holder for graphene film synthesis, and uses thereof

A method for generating a graphene film, comprising:

• implementing a horizontally-oriented substrate holder having a first width and a first height, wherein the substrate holder includes (i) an open front side, (ii) two solid lateral sides each comprised of a solid material, (iii) a solid back side comprised of the solid material, (iv) a solid top comprised of the solid material, and (v) a solid bottom comprised of the solid material, wherein the one open side exposes a cavity formed within the two solid lateral sides, the solid back side, the solid top, and the solid bottom;
• positioning a horizontally-oriented cap with the substrate holder, wherein the cap has a second width and a second height, wherein the cap includes (i) an open back side, (ii) two solid lateral sides each comprised of solid copper foil, (iii) a solid front side comprises of solid copper foil, (iv) a solid top comprised of solid copper foil, and (v) a solid bottom comprises of solid copper foil, and wherein positioning the cap comprises surrounding the open front side of the substrate holder with the open back side of the cap, thereby forming a gap between the solid top of the cap and the solid top of the substrate holder, enabling flow of one or more gases in and/or out of the substrate holder via the open back side of the cap and the open front side of the substrate holder;
• placing a substrate for graphene film synthesis inside of the cavity of the substrate holder;
• and
• generating a graphene film on the substrate via chemical vapor deposition.