title: Creation of localized spins in graphene by ring-opening of epoxy derived hydroxyl.
abstract: Creation of high-density localized spins in the basal plane of graphene sheet by introduction of sp(3)-type defects is considered to be a potential route for the realization of high-magnetization graphene. Theoretical and experimental studies confirmed that hydroxyl can be an effective sp(3)-type candidate for inducing robust magnetic moment. However, the artificial generation of hydroxyl groups for creating high-density spins on the basal plane of graphene sheet is very scarce. Here we demonstrate that high-content hydroxyl groups can be generated on the basal plane of graphene oxide (GO) sheet by ring opening of epoxy groups. We show that by introduction of 10.74 at.% hydroxyl groups, the density of localized spins of GO can be significantly increased from 0.4 to 5.17 μB/1000 C. Thus, this study provided an effective method to obtain graphene with high-density localized spins.
authors.affiliation: Nanjing National Laboratory of Microstructures &Jiangsu Provincial Laboratory for Nanotechnology, Nanjing University, Nanjing 210093, PR China.
authors.forename: Jie
authors.initials: J
authors.lastname: Chen
authors.affiliation: Nanjing National Laboratory of Microstructures &Jiangsu Provincial Laboratory for Nanotechnology, Nanjing University, Nanjing 210093, PR China.
authors.forename: Weili
authors.initials: W
authors.lastname: Zhang
authors.affiliation: Nanjing National Laboratory of Microstructures &Jiangsu Provincial Laboratory for Nanotechnology, Nanjing University, Nanjing 210093, PR China.
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Sun
authors.affiliation: Nanjing National Laboratory of Microstructures &Jiangsu Provincial Laboratory for Nanotechnology, Nanjing University, Nanjing 210093, PR China.
authors.forename: Yongping
authors.initials: Y
authors.lastname: Zheng
authors.affiliation: Nanjing National Laboratory of Microstructures &Jiangsu Provincial Laboratory for Nanotechnology, Nanjing University, Nanjing 210093, PR China.
authors.forename: Nujiang
authors.initials: N
authors.lastname: Tang
authors.affiliation: Nanjing National Laboratory of Microstructures &Jiangsu Provincial Laboratory for Nanotechnology, Nanjing University, Nanjing 210093, PR China.
authors.forename: Youwei
authors.initials: Y
authors.lastname: Du
mesh_terms: D006108:Graphite / Q000737:chemistry*; D017665:Hydroxyl Radical; D008280:Magnetics; D015394:Molecular Structure; D010087:Oxides
chemical_list: D010087:Oxides; D017665:Hydroxyl Radical; D006108:Graphite