The copper phthalocyanine and 2,3,5,6‐tetrafluoro‐tetracyano‐quino‐dimethane molecules adsorbed on the copper and single‐layer graphene‐modified copper surfaces have been investigated using Raman and X‐ray photoelectron spectroscopy. The adsorbed amounts for both molecules on the two different substrates are almost comparable as confirmed by the C 1s and N 1s core level X‐ray photoelectron spectra. Raman signal enhancement has been observed for both molecules when they are adsorbed on the graphene surface. The strongest chemical interaction is observed between the 2,3,5,6‐tetrafluoro‐tetracyano‐quino‐dimethane and copper substrate. Based on the Raman and X‐ray photoelectron spectroscopic data, the mechanism of the graphene‐enhanced Raman scattering is discussed, which might greatly rely on the unique electronic properties of graphene.

中文翻译：

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铜酞菁/石墨烯和2,3,5,6-四氟-四氰基-喹啉-二氯甲烷/石墨烯界面的拉曼光谱

使用拉曼和X射线光电子能谱研究了铜酞菁和吸附在铜和单层石墨烯修饰的铜表面上的2,3,5,6-四氟-四氰基-喹啉-二甲烷分子。正如C 1s和N 1s核心能级X射线光电子能谱所证实的，两种分子在两种不同基质上的吸附量几乎是可比的。当两个分子被吸附在石墨烯表面上时，都观察到拉曼信号增强。在2,3,5,6-四氟-四氰基-喹啉-二甲烷和铜基质之间观察到最强的化学相互作用。基于拉曼和X射线光电子能谱数据，讨论了石墨烯增强拉曼散射的机理，这可能极大地依赖于石墨烯的独特电子性质。