Growth and Characterization of Cadmiun Sulphide Nanocrystals Embedded in Silicon Dioxide Thin Films A.G. Rolo, L.G. Vieira, M.J.M. Gomes, J.L. Ribeiro, M.S. Belsley “NATO ARW sobre “ Nanoparticles in Solids and Solutions. An Integrated Approach to their Preparation and Characterizattion”, Szeged, Hungria, 8-13 Março de 1996.