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Abstract
Surface-enhanced Raman spectroscopy (SERS) relies on adsorbing target molecules onto metal nanostructures where the light can resonantly couple with localised surface plasmon resonances. These plasmons can be tuned by changing the nanostructure size, shape, spacing and composition, but this is a complex process. Therefore, having an experimental method that can directly map the plasmons would be extremely useful for developing SERS-active substrates. This paper investigates the possibility of applying a novel scanning probe method, scanning probe energy loss spectroscopy, to map the plasmonic behaviour of SERS-active metal nanostructures in order to optimise their enhancement factor and reproducibility.
Highlights
Raman spectroscopy uses the inelastic scattering of light to probe the characteristic vibrational modes of target molecules in an analyte and provide unambiguous chemical identification
This paper investigates the possibility of applying a novel scanning probe method, scanning probe energy loss spectroscopy, to map the plasmonic behaviour of SERS-active metal nanostructures in order to optimise their enhancement factor and reproducibility
In surface-enhanced Raman spectroscopy (SERS), the signal is enhanced by adsorbing the target molecule onto a nanostructured metal substrate, where light can resonantly couple with localised surface plasmon resonances (LSPR)
Summary
Raman spectroscopy uses the inelastic scattering of light to probe the characteristic vibrational modes of target molecules in an analyte and provide unambiguous chemical identification. This paper investigates the possibility of applying a novel scanning probe method, scanning probe energy loss spectroscopy, to map the plasmonic behaviour of SERS-active metal nanostructures in order to optimise their enhancement factor and reproducibility.
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