Synthesis of Suitable SiO2 Nano Particles as the Core in Core–Shell Nanostructured Materials

The effect of surfactant on the luminescent intensity of SiO2@Y2O3:Eu3+ particles with a core shellstructure is described. Core–shell particles are used in phosphor materials and employing sphericalparticles with a narrow size distribution is vital for the enhancement of luminescent properties. Threekinds of different surfactants were used to synthesis SiO2 nano particles via a sol gel process. Theresults demonstrated that comb polycarboxylic acid surfactant had a significant influence on themorphology and particle size distribution. Somehow, particles with 100 nm size and narrow sizedistribution were produced. These particles had relatively uniform packing, unlike particles producedwith other surfactants or without surfactant which had irregular assembly. The photoluminescenceintensity of SiO2@Y2O3:Eu3+ particles that was synthesized by comb polycarboxylic acid surfactantwas higher than those which were produced without surfactant