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A Silver nanocomposite which used to enhance the fluorescence was developed in this paper.Metal-enhanced fluorescence Y2O3:Eu absorbed Ag@SiO2 compostie nanoparticles,where the silica-shell is used to control the distance between silver-core and Y2O3:Eu.Silver nanoparticles with typical diameter of about 50nm have been prepared via a polyol process [1],and given high stability and mondispersity.