Size-dependent photoluminescent property of hybrid nanoparticlesconsisted with YVO4:Eu3+ and gold

The hydrothermally synthesizedYVO4:Eu3+nanophosphors were mixed with gold nanoparticles with different sizes to form hybrid nanoparticles. The microstructure and luminescent properties of all hybrid nanoparticles were charaterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), UV-Visible absorption spectrum (UV-Vis), and photoluminescence (PL) spectroscopy. The growth process of gold nanoparticles prepared by seeding growth method was discussed firstly. Furthermore, the effects of grain size of gold nanoparticles on the fluorescent property of hybrid nanoparticles were investigated in detail. All the emission spectra presented the characteristic red emission of Eu3+. The emission intensity of hybrid nanoparticles was increasing with the growing of gold nanoparticles. The influential mechanism was discussed as well.