title: Oxygen-assisted charge transfer between ZnO quantum dots and graphene.
abstract: Efficient charge transfer between ZnO quantum dots (QDs) and graphene is demonstrated by decorating ZnO QDs on top of graphene, with the assistance of oxygen molecules from the air. The electrical response of the device to UV light is greatly enhanced, and a photoconductive gain of up to 10(7) can be obtained.
authors.affiliation: Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.
authors.forename: Wenhao
authors.initials: W
authors.lastname: Guo
authors.forename: Shuigang
authors.initials: S
authors.lastname: Xu
authors.forename: Zefei
authors.initials: Z
authors.lastname: Wu
authors.forename: Ning
authors.initials: N
authors.lastname: Wang
authors.forename: M M T
authors.initials: MM
authors.lastname: Loy
authors.forename: Shengwang
authors.initials: S
authors.lastname: Du
mesh_terms: D006108:Graphite / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry*; D045663:Quantum Dots / Q000737:chemistry*; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D006108:Graphite; D010100:Oxygen; D015034:Zinc Oxide
keywords: ZnO; charge transfer; graphene; oxygen; quantum dots