“Preparation and Characterization of Hybrid Sol-Gel Materials Containing CdS Nanoparticles” V.I.Boev, C.J.R. Silva, I.C. Neves, M.J.M. Gomes Nano´2003-III Ibero American Workshop on Nanostructures for Application in Micro and Optoelectronics, CSIC-UAM, Madrid, Espanha, 24-28 de Março de 2003