Abstract
We present a method for combined far-field Raman imaging, topography analysis and near-field spectroscopy. Surface-enhanced Raman spectra of Rhodamine 6G (R6G) deposited on silver nanoparticles were recorded using a bent fibre aperture-type near-field scanning optical microscope (NSOM) operated in illumination mode. Special measures were taken to enable optical normal-force detection for control of the tip-sample distance. Comparisons between far-field Raman images of R6G-covered Ag particle aggregates with topographic images recorded using atomic force microscopy (AFM) indicate saturation effects due to resonance excitation.
| Original language | English |
|---|---|
| Pages (from-to) | 269-273 |
| Number of pages | 5 |
| Journal | Journal of Microscopy |
| Volume | 210 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 1 Jun 2003 |
| Externally published | Yes |
Keywords
- Colloidal silver nanoparticles
- Near-field optics
- Surface-enhanced Raman spectroscopy
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