Fesenko Olena, Dovbeshko Galyna, Dementjev Andrej, Karpicz Renata, Kaplas Tommi, Svirko Yuri
Institute of Physics, National Academy of Sciences of Ukraine, 46 Nauki Ave., Kyiv, 03680 Ukraine.
Center for Physical Sciences and Technology, Institute of Physics, A. Goštauto 11, Vilnius, LT-01108 Lithuania.
Nanoscale Res Lett. 2015 Apr 2;10:163. doi: 10.1186/s11671-015-0869-4. eCollection 2015.
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.
研究了吸附在单层石墨烯上的胸腺嘧啶分子的石墨烯增强拉曼散射（GERS）光谱和相干反斯托克斯拉曼散射（CARS）。结果表明，增强因子取决于胸腺嘧啶的分子基团。在胸腺嘧啶的GERS光谱中，主要谱带相对于吸附在玻璃表面的分子发生了位移，这表明胸腺嘧啶在石墨烯上发生了电荷转移。讨论了GERS增强的可能机制。CARS光谱与GERS结果一致，这表明化学增强带来了类似的益处。
