title: Magnetic field tuned charge transport in a G4-DNA molecular device.
abstract: We study the effect of magnetic field on charge transport in a metal/G4-DNA/metal device based on the lattice Green function method and Landauer-Büttiker theory. The basic transport property of the device is closely related to the coupling method between the G4-DNA molecule and metal electrodes. A magnetoresistance (MR) as large as 16% is obtained with a magnetic field on the order of 1 T. The special helix structure of the G4-DNA molecule will have a dramatic effect on the magnetic response of the device. The MR of the device is sensitive to overwinding or unwinding of the G4-DNA molecule helix. Our investigation suggests a new way to explore DNA based electronics.
authors.affiliation: Shandong University, Jinan 250100, People's Republic of China.
authors.forename: Dawei
authors.initials: D
authors.lastname: Kang
authors.forename: Hong
authors.initials: H
authors.lastname: Jiang
authors.forename: Zhen
authors.initials: Z
authors.lastname: Sun
authors.forename: Zhen
authors.initials: Z
authors.lastname: Qu
authors.forename: Shijie
authors.initials: S
authors.lastname: Xie
mesh_terms: D004247:DNA / Q000737:chemistry*; D055615:Electrical Equipment and Supplies; D004579:Electron Transport; D054856:G-Quadruplexes; D008280:Magnetics; D008670:Metals / Q000737:chemistry; D008958:Models, Molecular
chemical_list: D008670:Metals; D004247:DNA