Strained graphene as a local probe for plasmon-enhanced Raman scattering by gold nanostructures
Strained graphene as a local probe for plasmon-enhanced Raman scattering by gold nanostructures
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应变石墨烯作为金纳米结构等离子体增强拉曼散射的局部探针
DOI：
10.1002/pssr.201308145
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Heeg S
中科院分区：
文献类型：
--
作者：
Heeg S
我们用拉曼光谱研究了不同形状、尺寸和几何形状的金纳米结构如何通过应变局部修饰石墨烯覆盖层。由此产生的声子软化转化为石墨烯的2D模式的频率下移高达85 cm-1。与空间分辨和激发相关的拉曼测量，我们证明了下移的拉曼峰专门产生于应变石墨烯等离子体增强的纳米结构。信号产生于远低于激光光斑大小的区域。它们作为石墨烯和强光场之间相互作用的局部探针。（© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA，魏因海姆）
We investigate with Raman spectroscopy how gold nanostructures of different shape, size and geometry locally modify a graphene cover layer through strain. The resulting phonon softening translates into frequency downshifts of up to 85 cm–1for the 2D‐mode of graphene. With spatially resolved and excitation dependent Raman measurements we demonstrate that the downshifted Raman peaks exclusively arise from strained graphene subject to plasmonic enhancement by the nanostructures. The signals arise from an area well below the size of the laser spot. They serve as a local probe for the interaction between graphene and intense light fields. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)