title: Electronic fingerprints of DNA bases on graphene.
abstract: We calculate the electronic local density of states (LDOS) of DNA nucleotide bases (A,C,G,T), deposited on graphene. We observe significant base-dependent features in the LDOS in an energy range within a few electronvolts of the Fermi level. These features can serve as electronic fingerprints for the identification of individual bases in scanning tunneling spectroscopy (STS) experiments that perform image and site dependent spectroscopy on biomolecules. Thus the fingerprints of DNA-graphene hybrid structures may provide an alternative route to DNA sequencing using STS.
authors.affiliation: Department of Physics, University of Washington, Seattle, Washington 98195, USA. atowfiq@u.washington.edu
authors.forename: Towfiq
authors.initials: T
authors.lastname: Ahmed
authors.forename: Svetlana
authors.initials: S
authors.lastname: Kilina
authors.forename: Tanmoy
authors.initials: T
authors.lastname: Das
authors.forename: Jason T
authors.initials: JT
authors.lastname: Haraldsen
authors.forename: John J
authors.initials: JJ
authors.lastname: Rehr
authors.forename: Alexander V
authors.initials: AV
authors.lastname: Balatsky
mesh_terms: D004247:DNA / Q000737:chemistry*; D004583:Electrons; D006108:Graphite / Q000737:chemistry*; D016252:Microscopy, Scanning Tunneling; D009711:Nucleotides / Q000737:chemistry
chemical_list: D009711:Nucleotides; D006108:Graphite; D004247:DNA