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Cerium-doped MoO3 thin films were grown through spray pyrolysis using (NH4) 6Mo7O 24 4H2O 0.1 M solution. The doping was performed by adding 0.1M CeCl3.7H2O, in a ratio of 2% by volume. X-ray and Auger electron spectra show of Ce incorporation in MoO3 thin film. X-ray diffraction showed that Cerium insertion destroys the α-MoO3 structure observed in undoped films. The electrochemical properties were studied using the cyclic voltammetry technique with -400 to 400 mV and scanning speeds from 16 to 144 mV/s. It was established that the diffusion coefficient varies from 1.06 x 10-10 cm²/s for the undoped film to 3.49 x 10 cm²/s for doped film. This suggests that the doped film favors ion exchange processes. The optical transmittance in the range of 290-2500 nm showed that the light transmission of the film doped with Cerium is higher by 10% compared to the undoped film. [ABSTRACT FROM AUTHOR]

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MoO3 thin films have been deposited on clean glass slides using the spray pyrolysis technique. The samples were grown with different thicknesses by spraying on common glass substrates a solution of (ammoniummolybdatetetrahydrate) ((NH3)6Mo7O244H2O). The samples were characterized by X-ray diffraction (XRD), infrared spectroscopy, scanning electron microscopy (SEM) and electrically through electrical resistivity measurements as a function of temperature. It was found that samples present crystalline structure associated with the alpha phase of MoO3 grown with preferential direction of growth along the planes (0k0). As result of increasing the volume of precursor solution sample surface becomes porous. The change in electrical resistance of MoO3 films by exposure to carbon monoxide (CO) at room temperature, makes the films obtained by this technique could be promising in its use in gas sensing devices at room temperature. [ABSTRACT FROM AUTHOR]

It was described the Li atoms incorporation in MoO3 thin films. Samples were prepared by evaporation using a CO2 Laser working at continuum wave mode. There were used targets with 1%, 2% and 5% (Li ions/Total cations). Samples were characterized with X ray Diffraction (XRD). XRD spectra showed that samples prepared with substrate temperatures lower than 200 \C were amorphous, for higer temperatures, samples grow whith a mixture of the a and b phases of LiMoO3 and Li2MoO4 with orientation through (100), (111) y (012) planes. [ABSTRACT FROM AUTHOR]