Abstract
The simultaneous measurement of surface plasmon resonance (SPR) spectroscopy and surface-enhanced Raman scattering (SERS) on flat metallic surfaces is demonstrated on a relatively simple experimental setup based on the Kretschmann configuration. This setup requires only minor modifications to standard Raman microscopes, and we show that it can be applied successfully to the most common conditions of SPR spectroscopy, i.e., water-based solutions on gold films. Our results emphasize the peculiar properties of the Kretschmann configuration for spectroscopy in general and SERS measurements in particular, especially in terms of the asymmetry between excitation and collection requirements. The combination of simultaneous SPR-SERS spectroscopy opens up interesting prospects in analytical science to study, for example, reaction kinetics at surfaces under conditions which are already available in commercial SPR instruments.
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