Tip-Enhanced Raman Spectroscopy and Imaging: An Apical Illumination Geometry

被引：19

作者：

Schultz, Zachary D. ^{[1
]}

Stranick, Stephan J. ^{[2
]}

Levin, Ira W. ^{[1
]}

机构：

[1] NIDDK, Chem Phys Lab, NIH, Bethesda, MD 20892 USA

[2] Natl Inst Stand & Technol, Surface & Microanal Sci Div, Gaithersburg, MD 20899 USA

来源：

APPLIED SPECTROSCOPY | 2008年 / 62卷 / 11期

基金：

美国国家卫生研究院;

关键词：

Tip-enhanced Raman spectroscopy; TERS; Raman spectroscopy; Near field; Microscopy; Imaging; Vibrational spectroscopy; Radial polarization;

D O I：

10.1366/000370208786401635

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Results are presented illustrating the use of tip-enhanced Raman spectroscopy (TERS) 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 5X increased enhancement compared to a linearly polarized beam. This multiplicative enhancement facilitates a discrimination of tile 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 All, glass, and Si. The near-field Raman spectra of Si(100), rhodamine B, brilliant cresyl blue, and single wall carbon nanotubes are presented. 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.

引用

页码：1173 / 1179

页数：7

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