Graphene-enhanced Raman spectroscopy of thymine adsorbed on single-layer graphene

Olena Fesenko; Galyna Dovbeshko; Andrej Dementjev; Renata Karpicz; Tommi Kaplas; Yuri Svirko

doi:10.1186/s11671-015-0869-4

Graphene-enhanced Raman spectroscopy of thymine adsorbed on single-layer graphene

Nanoscale Res Lett. 2015 Apr 2:10:163. doi: 10.1186/s11671-015-0869-4. eCollection 2015.

Authors

Olena Fesenko¹, Galyna Dovbeshko¹, Andrej Dementjev², Renata Karpicz², Tommi Kaplas³, Yuri Svirko³

Affiliations

¹ Institute of Physics, National Academy of Sciences of Ukraine, 46 Nauki Ave., Kyiv, 03680 Ukraine.
² Center for Physical Sciences and Technology, Institute of Physics, A. Goštauto 11, Vilnius, LT-01108 Lithuania.
³ Institute of Photonics, University of Eastern Finland, Yliopistokatu 7, Joensuu, FI-80101 Finland.

Abstract

Graphene-enhanced Raman scattering (GERS) spectra and coherent anti-Stokes Raman scattering (CARS) of thymine molecules adsorbed on a single-layer graphene were studied. The enhancement factor was shown to depend on the molecular groups of thymine. In the GERS spectra of thymine, the main bands are shifted with respect to those for molecules adsorbed on a glass surface, indicating charge transfer for thymine on graphene. The probable mechanism of the GERS enhancement is discussed. CARS spectra are in accord with the GERS results, which indicates similar benefit from the chemical enhancement.

Keywords: Coherent anti-Stokes Raman scattering (CARS); Graphene-enhanced Raman scattering (GERS); Graphene-enhanced coherent anti-Stokes Raman scattering (GECARS); Single-layer graphene; Surface-enhanced Raman spectroscopy (SERS); Thymine.