Fig. 1. Mirror reflection effect of silver nanoparticles monolayer at the interface between water phase and oil phase

Fig. 2. Morphology of Au@Ag NPs （a） and Ag NPs （b） self-assembled sample； Morphology of Au@Ag （c） NPs and Ag NPs （d） after annealing.

Fig. 3. Transmission curves of nanoparticle samples in the range of 300~900 nm. （a） Au@Ag NPs self-assembly and annealed samples； （b） Ag NPs self-assembly and annealed samples.

Fig. 4. （a） Variation curves of the simulation of Ag NPs array transmission spectra with particle spacing； （b） Variation curves of the simulation of Ag NPs array transmission spectra with particle diameter.

Fig. 5. Light transmission effect of nanoparticle samples under ordinary white LED containing a large amount of blue light. The actual transmittance effect of Au@Ag NPs （a） and Ag NPs （b） self-assembled and unannealed， and Au@Ag NPs （c） and Ag NPs （d） self-assembled and annealed.