title: Large-scale pattern growth of graphene films for stretchable transparent electrodes.
abstract: Problems associated with large-scale pattern growth of graphene constitute one of the main obstacles to using this material in device applications. Recently, macroscopic-scale graphene films were prepared by two-dimensional assembly of graphene sheets chemically derived from graphite crystals and graphene oxides. However, the sheet resistance of these films was found to be much larger than theoretically expected values. Here we report the direct synthesis of large-scale graphene films using chemical vapour deposition on thin nickel layers, and present two different methods of patterning the films and transferring them to arbitrary substrates. The transferred graphene films show very low sheet resistance of approximately 280 Omega per square, with approximately 80 per cent optical transparency. At low temperatures, the monolayers transferred to silicon dioxide substrates show electron mobility greater than 3,700 cm(2) V(-1) s(-1) and exhibit the half-integer quantum Hall effect, implying that the quality of graphene grown by chemical vapour deposition is as high as mechanically cleaved graphene. Employing the outstanding mechanical properties of graphene, we also demonstrate the macroscopic use of these highly conducting and transparent electrodes in flexible, stretchable, foldable electronics.
authors.affiliation: Department of Chemistry, Sungkyunkwan University, Suwon 440-746, Korea.
authors.forename: Keun Soo
authors.initials: KS
authors.lastname: Kim
authors.forename: Yue
authors.initials: Y
authors.lastname: Zhao
authors.forename: Houk
authors.initials: H
authors.lastname: Jang
authors.forename: Sang Yoon
authors.initials: SY
authors.lastname: Lee
authors.forename: Jong Min
authors.initials: JM
authors.lastname: Kim
authors.forename: Kwang S
authors.initials: KS
authors.lastname: Kim
authors.forename: Jong-Hyun
authors.initials: JH
authors.lastname: Ahn
authors.forename: Philip
authors.initials: P
authors.lastname: Kim
authors.forename: Jae-Young
authors.initials: JY
authors.lastname: Choi
authors.forename: Byung Hee
authors.initials: BH
authors.lastname: Hong