BigPatents India

The present invention provides an improved process for the preparation of ultrathin/ thin films of metallic compounds comprising of preparing an aqueous solution containing cation/anion or species of corresponding elements in a concentration ranging 10-5 to 10-3M leading to the formation of metal oxides, chalcogenides or halides of which the thin film is desired; adjusting the PH of the solution; preparing a solution of the cation or anion in a volatile organic solvent or a mixture of organic solvents and water leading to formation of metal oxides, chalcogenides, and halides on reacting only in solution form ; spreading the solution on the aqueous solution to form a film at the interface of the aqueous and solvent solutions, evaporating the solvent, compressing the film formed at the interface laterally with a constant compression pressure; dipping a substrate in the solution and withdrawing it from the solution at a uniform rate in the range of 0.5 to 1.5 m/min at a temperature range of 10-500C;heating thin films formed for crystallization at a temperature ranging between 500 to 8000C to obtain the product.