Silver-silica-gold electrode
A novel Ag-silica-Au hybrid device is developed that displays a long-range plasmon transfer of Ag to Au leading to enhanced Raman scattering of molecules largely separated from the optically excited Ag surface.
You can find the full article of Peter Hildebrandt and coworkers on "Induced SER-Activity in Nanostructured Ag–Silica–Au Supports via Long-Range Plasmon Coupling": Research\Research Highlights