title: Graphene-Enhanced Raman Scattering from the Adenine Molecules.
abstract: An enhanced Raman scattering from a thin layer of adenine molecules deposited on graphene substrate was detected. The value of enhancement depends on the photon energy of the exciting light. The benzene ring in the structure of adenine molecule suggests π-stacking of adenine molecule on top of graphene. So, it is proposed that the enhancement in the adenine Raman signal is explained by the resonance electron transfer from the Fermi level of graphene to the lowest unoccupied molecular orbital (LUMO) level of adenine.
authors.affiliation: Institute of Physics, University of Tartu, W. Ostwald st 1, Tartu, 50411, Estonia.
authors.forename: Leonid
authors.initials: L
authors.lastname: Dolgov
authors.affiliation: Institute of Physics, NAS of Ukraine, Prospect Nauky 46, Kyiv, 03028, Ukraine. den_podg@mail.ru.
authors.forename: Denys
authors.initials: D
authors.lastname: Pidhirnyi
authors.affiliation: Institute of Physics, NAS of Ukraine, Prospect Nauky 46, Kyiv, 03028, Ukraine.
authors.forename: Galyna
authors.initials: G
authors.lastname: Dovbeshko
authors.affiliation: Institute of Physics, NAS of Ukraine, Prospect Nauky 46, Kyiv, 03028, Ukraine.
authors.forename: Tetiana
authors.initials: T
authors.lastname: Lebedieva
authors.affiliation: Institute of Physics, University of Tartu, W. Ostwald st 1, Tartu, 50411, Estonia.
authors.forename: Valter
authors.initials: V
authors.lastname: Kiisk
authors.affiliation: Institute of Physics, University of Tartu, W. Ostwald st 1, Tartu, 50411, Estonia.
authors.forename: Siim
authors.initials: S
authors.lastname: Heinsalu
authors.affiliation: Institute of Physics, University of Tartu, W. Ostwald st 1, Tartu, 50411, Estonia.
authors.forename: Sven
authors.initials: S
authors.lastname: Lange
authors.affiliation: Institute of Physics, University of Tartu, W. Ostwald st 1, Tartu, 50411, Estonia.
authors.forename: Raivo
authors.initials: R
authors.lastname: Jaaniso
authors.affiliation: Institute of Physics, University of Tartu, W. Ostwald st 1, Tartu, 50411, Estonia.
authors.forename: Ilmo
authors.initials: I
authors.lastname: Sildos
keywords: Adenine; Chemical enhancement; Graphene; Raman scattering