Near-field and confocal surface-enhanced resonance Raman spectroscopy at cryogenic temperatures

被引：22

作者：

Anger, P ^{[1
]}

Feltz, A

Berghaus, T

Meixner, AJ

机构：

[1] Univ Siegen, D-57068 Siegen, Germany

[2] Omicron NanoTechnol GmbH, D-65232 Taunusstein, Germany

来源：

JOURNAL OF MICROSCOPY-OXFORD | 2003年 / 209卷

关键词：

confocal microscopy; low temperature; nano-particles; near-field optical microscopy; rhodamine; 6G; surface-enhanced resonance Raman effect;

D O I：

10.1046/j.1365-2818.2003.01089.x

中图分类号：

TH742 [显微镜];

学科分类号：

摘要：

For laser spectroscopy at variable temperatures with high spatial resolution a combined scanning near-field optical and confocal microscope was developed. Rhodamine 6G (R6G) dye molecules dispersed on silver nano-particles or nano-clusters were investigated. For optical excitation of the molecules, either an aperture probe or a focused laser spot in confocal arrangement were employed. Raman spectra in the wavenumber range between 300 cm(-1) and 3000 cm(-1) at room temperatures down to 8.5 K were recorded. Many of the observed Raman lines can be associated with the structure of the adsorbed molecule. Intensity fluctuations in spectral sequences were observed down to 77 K and are indicative of single molecule sensitivity.

引用

页码：162 / 166

页数：5

共 13 条

[1] Confocal microscopy with a high numerical aperture parabolic mirror [J].