title: Synthesis of graphene sheets with high electrical conductivity and good thermal stability by hydrogen arc discharge exfoliation.
abstract: We developed a hydrogen arc discharge exfoliation method for the synthesis of graphene sheets (GSs) with excellent electrical conductivity and good thermal stability from graphite oxide (GO), in combination with solution-phase dispersion and centrifugation techniques. It was found that efficient exfoliation and considerable deoxygenation of GO, and defect elimination and healing of exfoliated graphite can be simultaneously achieved during the hydrogen arc discharge exfoliation process. The GSs obtained by hydrogen arc discharge exfoliation exhibit a high electrical conductivity of approximately 2 x 10(3) S/cm and high thermal stability with oxidization resistance temperature of 601 degrees C, which are much better than those prepared by argon arc discharge exfoliation (approximately 2 x 10(2) S/cm, 525 degrees C) and by conventional thermal exfoliation (approximately 80 S/cm, 507 degrees C) with the same starting GO. These results demonstrate that this hydrogen arc discharge exfoliation method is a good approach for the preparation of GSs with a good quality.
authors.affiliation: Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, P. R. China.
authors.forename: Zhong-Shuai
authors.initials: ZS
authors.lastname: Wu
authors.forename: Wencai
authors.initials: W
authors.lastname: Ren
authors.forename: Libo
authors.initials: L
authors.lastname: Gao
authors.forename: Jinping
authors.initials: J
authors.lastname: Zhao
authors.forename: Zongping
authors.initials: Z
authors.lastname: Chen
authors.forename: Bilu
authors.initials: B
authors.lastname: Liu
authors.forename: Daiming
authors.initials: D
authors.lastname: Tang
authors.forename: Bing
authors.initials: B
authors.lastname: Yu
authors.forename: Chuanbin
authors.initials: C
authors.lastname: Jiang
authors.forename: Hui-Ming
authors.initials: HM
authors.lastname: Cheng