title: Charging of unfunctionalized graphene in organic solvents.
abstract: Unfunctionalized graphene is positively or negatively charged when it is dispersed in organic solvents. The charging is negative in solvents with high electron donor numbers and positive in those with low donor numbers. We suggest that the charging originates from electron transfer between graphene surfaces and solvent molecules, and the stable dispersion of unfunctionalized graphene in organic solvents is mainly controlled by electrostatic repulsion between the charged graphene surfaces.
authors: School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai, 200240, PR China.
authors: Wei Wei
authors: WW
authors: Liu
authors: Jian Nong
authors: JN
authors: Wang
authors: Xiao Xia
authors: XX
authors: Wang
mesh_terms: D006108:Graphite / Q000737:chemistry*; D008422:Materials Testing; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D009930:Organic Chemicals / Q000737:chemistry*; D010316:Particle Size; D012997:Solvents / Q000737:chemistry*; D055672:Static Electricity
chemical_list: D009930:Organic Chemicals; D012997:Solvents; D006108:Graphite