Abstract Infrared spectroscopy is widely used technique for observing bioorganic materials, but sometimes scientist have to work with small amount of investigated materials and infrared light interacts poorly with nanometric size molecules. Taking into account unique electro-optical properties of graphene and metal we demonstrated possibility to use metal-graphene nanostructures for label-free detection of thymine. It was shown that IR spectra of thymine adsorbed on the composite nanostructures, such as Au “nanostars” with graphene, is more enhanced than whenthese nanoparticles are used without graphene. The enhancement in IR absorption for complex thymine/Au/graphene depends on size of Au nanoparticlesand thymine’s molecular group.

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用于 SEIRA 光谱的金属石墨烯纳米结构

摘要 红外光谱是广泛用于观察生物有机材料的技术，但有时科学家不得不处理少量的研究材料，而且红外光与纳米级分子的相互作用很差。考虑到石墨烯和金属的独特电光特性，我们证明了使用金属-石墨烯纳米结构进行胸腺嘧啶无标记检测的可能性。结果表明，吸附在复合纳米结构上的胸腺嘧啶的红外光谱，例如含有石墨烯的金“纳米星”，比使用这些纳米颗粒时没有石墨烯的情况更强。复合胸腺嘧啶/金/石墨烯的红外吸收增强取决于金纳米粒子的大小和胸腺嘧啶的分子组。