Third-order optical nonlinearities of thin solid films and liquid solution of CdS nanocrystals Yu.P. Rakovich, M.V. Artemyev, A.G. Rolo, M.I. Vasilevskiy and M.J.M. Gomes The International Conference on Semiconductor Quantum Dots (QD2000”), Munich, Alemanha 31 Julho – 3 Agosto de 2000.