title: Controlled modulation of electronic properties of graphene by self-assembled monolayers on SiO2 substrates.
abstract: In this study, with self-assembled monolayers (SAMs) of aminopropyl-, ammoniumpropyl-, butyl-, and 1H,1H,2H,2H-perfluorooctyltriethoxysilanes deposited in-between graphene and the SiO(2) substrate, a controlled doping of graphene was realized with a threshold voltage ranging from -18 to 30 V. In addition, the SAMs are covalently bonded to the SiO(2) surface rather than the graphene surface, thereby producing minimal effects on the mobility of the graphene. Finally, it is more stable than conventional noncovalent dopants.
authors.affiliation: Richard E. Smalley Institute for Nanoscale Science and Technology, Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005, USA.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Yan
authors.forename: Zhengzong
authors.initials: Z
authors.lastname: Sun
authors.forename: Wei
authors.initials: W
authors.lastname: Lu
authors.forename: Jun
authors.initials: J
authors.lastname: Yao
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhu
authors.forename: James M
authors.initials: JM
authors.lastname: Tour
mesh_terms: D004553:Electric Conductivity; D004583:Electrons; D006108:Graphite / Q000737:chemistry*; D012821:Silanes / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry*; D014173:Transistors, Electronic
chemical_list: D012821:Silanes; D012822:Silicon Dioxide; D006108:Graphite; C522569:triethoxysilane