Tip-enhanced Raman spectroscopy and imaging: an apical illumination geometry.
Tip-enhanced Raman spectroscopy and imaging: an apical illumination geometry.
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DOI：
10.1366/000370208786401635
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发表时间：
2008-11
影响因子：
3.5
通讯作者：
Levin IW
中科院分区：
文献类型：
--
作者：
Schultz ZD;Stranick SJ;Levin IW
结果说明了尖端增强拉曼光谱和成像在顶部照明几何图形的使用。径向偏振光束被用来产生沿光束传播方向、垂直于表面的电场分量，导致与线偏振光束相比增加了5倍。这种乘性增强有助于区分近场信号和远场拉曼背景。顶部照明配置便于应用TERS来研究各种表面上的分子，例如金、玻璃和硅。给出了Si(100)、罗丹明B、亮甲酚蓝和单壁碳纳米管的近场拉曼光谱。获得了足够的增强以允许对不同直径的大束碳纳米管的表面分布进行亚衍射有限分辨率的拉曼成像。
Results are presented illustrating the use of tip enhanced Raman spectroscopy and imaging in a top-illumination geometry. A radially polarized beam is used to generate an electric field component in the direction of beam propagation, normal to the surface, resulting in a 5× increased enhancement compared to a linearly polarized beam. This multiplicative enhancement facilitates a discrimination of the near field signal from the far field Raman background. The top illumination configuration facilitates the application of TERS for investigating molecules on a variety of surfaces, such as Au, glass, and Si. The near field Raman spectrum is presented of Si(100), rhodamine B, brilliant cresyl blue, and single wall carbon nanotubes. Sufficient enhancement is obtained to permit a sub-diffraction limited resolution Raman imaging of the surface distribution of large bundles of carbon nanotubes of various diameters.
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影响因子：
3.5
作者：
Picardi, Gennaro;Nguyen, Quang;Schreiber, Joachim
通讯作者：
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