Abstract
Gold colloidal containing rare-earth ions Eu 3+ were prepared at room temperature. Fluorescence spectra and resonance light scattering (RLS) spectra of Eu 3+ ions and gold colloid containing Eu 3+ were measured. For solution containing Eu 3+, RLS features show two peaks at the edges of the visible light wavelength region. The short wavelength peak takes place at about 400 nm and the longer wavelength peak is the corresponding 1/2 fraction frequency RLS peak, which takes place at about 780 nm. When gold colloids were added to the solution containing Eu 3+, both these two RLS peaks were enhanced. We believe that the energies, which are absorbed by the surface plasmon resonance in the gold nanoparticles, are efficiently transferred into the Eu 3+ ions to cause the increased scattering.
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