Ultraviolet Raman study of thymine on the Au electrode.
We record the potential-dependent Raman spectra of thymine adsorbed on the roughened Au electrode by ultraviolet (UV) excitation at 325 nm, and we find that the surface-enhanced Raman spectra of thymine changed intensely with the negative shift of the applied potential. When the vibrational mode changes, the resonance potential (potential of maximum intensity) varies accordingly, indicating that the thymine molecules were chemisorbed on the roughened Au surface. The charge transfer (CT) mechanism could probably explain the experiment results in the present work.
Hao
Yanling
Y
Beijing Key Laboratory for Nano-Photonics and Nano-Structure, Capital Normal University, Beijing, PR China.
Fang
Yan
Y
D000327:Adsorption; D004566:Electrodes; D006046:Gold / Q000737:chemistry*; D012996:Solutions; D013056:Spectrophotometry, Ultraviolet; D013059:Spectrum Analysis, Raman; D013941:Thymine / Q000737:chemistry*; D014732:Vibration
D012996:Solutions; D006046:Gold; D013941:Thymine