A new approach to the preparation of TiO2 nanoparticles embedded in organic films is described. This room-temperature method is based on a Langmuir-Blodgett standard procedure using an aqueous subphase in which TiO(C2O4)(2)(2-) is dissolved. Spectroscopic investigations on the subphase show that TiO2 nanoparticles are dispersed in the solution. Careful X-ray photoelectron spectroscopy characterisation of Langmuir-Blodgett films reveals that those particles are transferred into the interior of the films during growth of the n-octadecylamine layers.