Monolayer graphene from a green solid precursor

Monolayer and bilayer graphene sheets are synthesized by simple control pyrolysis of solid botanical derivative camphor (C10H16O), a green and renewable carbon source. Raman studies show much intense 2D peak than that of G peak, signifying presence of monolayer graphene. Transmission electron microscopic study shows predominately monolayer or bilayer graphene sheets, while trilayer graphene sheet were also observed. Synthesized graphene film on copper foil is transferred to poly(ethylene terephthalate) substrate to fabricate transparent electrode. Electrical and optical measurement shows a sheet resistance of 860 Ω/sq with a transmittance of 91% at 550 nm wavelength of the graphene film. The technique to fabricate monolayer or bilayer graphene based film from camphor is both viable and scalable for potential large area electronic applications.

Monolayer and bilayer graphene sheets were synthesized by simple control pyrolysis of solid botanical derivative camphor (C10H16O). The technique to fabricate monolayer or bilayer graphene based film from camphor is both viable and scalable for potential large area electronic applications.Figure optionsDownload as PowerPoint slideHighlights
► Monolayer and bilayer graphene sheets are synthesized from camphor.
► Raman and TEM study confirm monolayer graphene formation.
► Synthesized graphene film id transferred to PET substrate by chemical etching.
► Graphene on PET film shows very good transparency and sheet resistance.
► A sheet resistance of 860 Ω/sq with a transmittance of 91% at 550 nm wavelength was achieved.