A novel self-assembled hybrid nanocompound consisting of bismuth sulfide nanocrystals ( NCs) and nanoparticles (NPs) is used to study the enhancement of photoluminescence by localized surface plasmon resonance (LSPR). core-shell NPs were prepared by deposition of silica onto the surface of Ag NPs through the sol–gel method and followed by surface modification via 3-aminopropyltriethoxysilane for the coming conjugation with NCs. We propose the photoluminescence enhancement by the LSPR effect through adjusting the thickness of silica shell and the NP concentration. By modulating the thickness of the silica shell and the concentration of Ag NPs, the maximum enhancement of a 5.7 fold can be reached with the thickness of an shell at 22.5 nm. A clear red shift of the emission peaks in the NCs- NPs hybrid structures is observed. Such a metal-enhanced quantum dot (QD) fluorescence system may have promising applications in optoelectronic device.
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24 October 2016: A correction was made to the author affiliations.
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