SYNTHESIS AND CHARACTERIZATION OF METALLIC NANO-SPHERES

The SiO
₂
and SiO
₂
-Ag
⁰
nano-spheres by sol-gel method have new application in the field photonics crystals. In this report, we demonstrate the synthesis of silver particles by reduction Ag
⁺
, obtained nanoparticles with range of size 2-10 nm, on colloid silica sphere, the silver nanoparticles, appearing on the surface of the silica microsphere. The material morphology was examined by electron microscopy (TEM) and the optical properties were studied by photoluminescence with excitation wavelength of 320 and 380 nm, the luminescence emission observed in the range 400-550 nm.