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Large-Area Graphene Films by Simple Solution Casting of Edge-Selectively Functionalized Graphite

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posted on 28.06.2011, 00:00 by Seo-Yoon Bae, In-Yup Jeon, Jieun Yang, Noejung Park, Hyeon Suk Shin, Sungjin Park, Rodney S. Ruoff, Liming Dai, Jong-Beom Baek
We report edge-selective functionalization of graphite (EFG) for the production of large-area uniform graphene films by simply solution-casting EFG dispersions in dichloromethane on silicon oxide substrates, followed by annealing. The resultant graphene films show ambipolar transport properties with sheet resistances of 0.52–3.11 kΩ/sq at 63–90% optical transmittance. EFG allows solution processing methods for the scalable production of electrically conductive, optically transparent, and mechanically robust flexible graphene films for use in practice.