title: Defect healing of reduced graphene oxide via intramolecular cross-dehydrogenative coupling.
abstract: A chemical defect healing of reduced graphene oxide (RGO) was carried out via intramolecular cross-dehydrogenative coupling (ICDC) with FeCl3 at room temperature. The Raman intensity ratio of the G-band to the D-band, the IG/ID ratio, of the RGO was increased from 0.77 to 1.64 after the ICDC reaction. From XPS measurements, the AC=C/AC-C ratio, where the peak intensities from the C=C and C-C bonds are abbreviated as AC=C and AC-C, of the RGO was increased from 2.88 to 3.79. These results demonstrate that the relative amount of sp(2)-hybridized carbon atoms is increased by the ICDC reaction. It is of great interest that after the ICDC reaction the electrical conductivity of the RGO was improved to 71 S cm(-1), which is 14 times higher than that of as-prepared RGO (5 S cm(-1)).
authors.affiliation: Institute of Advanced Composite Materials, Korea Institute of Science and Technology (KIST), Eunha-ri san 101, Bondong-eup, Wanju-gun, Jeolabuk-do 565-905, Korea.
authors.forename: Ok-Kyung
authors.initials: OK
authors.lastname: Park
authors.forename: Yong-Mun
authors.initials: YM
authors.lastname: Choi
authors.forename: Jun Yeon
authors.initials: JY
authors.lastname: Hwang
authors.forename: Cheol-Min
authors.initials: CM
authors.lastname: Yang
authors.forename: Tea-Wook
authors.initials: TW
authors.lastname: Kim
authors.forename: Nam-Ho
authors.initials: NH
authors.lastname: You
authors.forename: Hye Young
authors.initials: HY
authors.lastname: Koo
authors.forename: Joong Hee
authors.initials: JH
authors.lastname: Lee
authors.forename: Bon-Cheol
authors.initials: BC
authors.lastname: Ku
authors.forename: Munju
authors.initials: M
authors.lastname: Goh