Enhanced fluorescence from Eu3+-doped silica gels by adsorbed CdS nanoparticles

Cadmium sulfide (CdS) semiconductor colloids are used, for the first time, in assessing the optical properties of a lanthanide ion, europium (Eu3+)-doped silica gels prepared by a sol–gel method. Adsorption and size-quantization of CdS nanoclusters enable a greater enhancement of fluorescence from the aforementioned gels.