title: Mechanical and environmental stability of polymer thin-film-coated graphene.
abstract: A uniform polymer thin layer of controllable thickness was bar-coated onto a chemical vapor deposition (CVD) grown monolayer graphene surface. The effects of this coating layer on the optical, electric, and tribological properties were then investigated. The thin polymer coating layer did not reduce the optical transmittance of the graphene films. The variation in the sheet resistance of the graphene films after the coating depended on the interaction between polymer and graphene. The top coating layer can maintain the high conductivity of chemical doped graphene films under long-term ambient conditions compared with uncovered doped samples. Friction tests demonstrated that the polymer coating layer can enhance both the friction force and the coefficient of friction of the graphene films and protect the graphene against damage in the repeated sliding processes.
authors.affiliation: SKKU Advanced Institute of Nanotechnology (SAINT) and Center for Human Interface Nano Technology (HINT), School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 440-746, Korea.
authors.forename: Chao
authors.initials: C
authors.lastname: Yan
authors.forename: Kwang-Seop
authors.initials: KS
authors.lastname: Kim
authors.forename: Seoung-Ki
authors.initials: SK
authors.lastname: Lee
authors.forename: Sang-Hoon
authors.initials: SH
authors.lastname: Bae
authors.forename: Byung Hee
authors.initials: BH
authors.lastname: Hong
authors.forename: Jae-Hyun
authors.initials: JH
authors.lastname: Kim
authors.forename: Hak-Joo
authors.initials: HJ
authors.lastname: Lee
authors.forename: Jong-Hyun
authors.initials: JH
authors.lastname: Ahn