Experimental Confirmation of Local Field Enhancement Determining Far‐Field Measurements with Shell‐Isolated Silver Nanoparticles

The first direct experimental evidence for the dependence on the local field enhancement with Raman/fluorescence measurements in the far field is provided. This is achieved using shell-isolated silver nanoparticles permitting recording both the surface-enhanced Raman scattering (SHINERS) and surface-enhanced fluorescence (SHINEF) in one spectrum from a low quantum yield target molecule in solution. In addition, it is found that the SHINEF approach using shell-isolated silver nanoparticles provides enhancement factors much higher than those achieved with gold SHINs.