title: A chemical route to graphene for device applications.
abstract: Oxidation of graphite produces graphite oxide, which is dispersible in water as individual platelets. After deposition onto Si/SiO2 substrates, chemical reduction produces graphene sheets. Electrical conductivity measurements indicate a 10000-fold increase in conductivity after chemical reduction to graphene. Tapping mode atomic force microscopy measurements show one to two layer graphene steps. Electrodes patterned onto a reduced graphite oxide film demonstrate a field effect response when the gate voltage is varied from +15 to -15 V. Temperature-dependent conductivity indicates that the graphene-like sheets exhibit semiconducting behavior.
authors.affiliation: Department of Chemistry and Biochemistry and California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, USA.
authors.forename: Scott
authors.initials: S
authors.lastname: Gilje
authors.forename: Song
authors.initials: S
authors.lastname: Han
authors.forename: Minsheng
authors.initials: M
authors.lastname: Wang
authors.forename: Kang L
authors.initials: KL
authors.lastname: Wang
authors.forename: Richard B
authors.initials: RB
authors.lastname: Kaner
mesh_terms: D004553:Electric Conductivity; D004566:Electrodes; D004867:Equipment Design; D006108:Graphite / Q000737:chemistry*; D018625:Microscopy, Atomic Force; D049329:Nanostructures / Q000737:chemistry; D036103:Nanotechnology / Q000379:methods*; D010087:Oxides / Q000737:chemistry; D012666:Semiconductors; D012825:Silicon / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry; D013499:Surface Properties; D013696:Temperature
chemical_list: D010087:Oxides; D012822:Silicon Dioxide; D006108:Graphite; D012825:Silicon