BigPatents India

An improved process for the preparation of a semiconductor nanocluster or polymer composite: The present invention provides an improved process for preparation of a semiconductor nanocluster or polymer composites useful for the applications in nonlinear optics. The process involves preparing a solution of metal cation selected from the group consisting of ZnCI2, Zn(NO3)2, Zn(CH3COO)2, Zn(HCOO)2, CdCb, Cd(NO3)2, Cd(CH3 COO)2, and Cd(HCOO)2 using a solvent and adding a capping agent to the above solution . The above reaction mixture is then treated with hydrogen sulfide or hydrogen selenide under stirring, and irradiated with y-rays at a temperature ranging between 0°C to 50°C for a period of 2 to 120 hrs., at a dose rate of 2000 rad/min in presence of a monomer to obtain the nanocomposite followed by washing with an organic solvent to obtain the pure product.