Fabrication of Si-Ag “wire-cap” nanostructures for metal-enhanced fluorescence

► A convenient strategy is demonstrated to fabricate Si-Ag “wire-cap” nanostructure. ► Optimized coupling between Ag caps and organic emitter can be achieved. ► The maximum photoluminescence enhancement ratio (∼7 times) is observed. ► Our technique has potential applications in biochemical sensors and light emitters.