The catalytic activity of nanotubular titanium dioxide films formed during the oxidation of acetone to carbon dioxide under the action of visible light with a wavelength of 450 nm was found to be approximately 2 times higher compared to standard titanium dioxide (Degussa P25). The nanotubular films were grown by the anodization of titanium foil using an original technique. Diffuse reflectance spectra of the films are attributed to enhanced activity in the visible spectrum by the nonstoichiometry of titanium dioxide near the interface between the nanotubular film and the titanium foil substrate.

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Chloro-species of molybdenum in oxidation states (III), (IV) and (V) were studied in a range of alkali chloride melts employing high temperature electronic absorption spectroscopy. The reaction rates of disproportionation of MoCl63- complex ions in various melts between 550 and 750 oC were determined. Mo(IV) species MoCl62- were generated and thermodynamic properties of Mo(IV) chloride in NaCl-CsCl eutectic melt estimated. Absorption spectra of molybdenum(V) MoCl6- were measured in a chloride melt for the first time. Speciation and behavior of molybdenum is required for designing processes for molten salt reprocessing of spent nuclear fuel (SNF).

High temperature absorption spectroscopy is used to study the effect of temperature in the range 550-750°C and the cation composition of a solvent salt on the spectroscopic characteristics and stability of complex ions in melts based on alkali metal chlorides (LiCl; CsCl; LiCl-KCl, NaCl-CsCl, KCl⎯CsCl, and NaCl-KCl-CsCl eutectic mixtures; and equimolar NaCl-KCl mixture).

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We have designed an automatic complex equipped by a Cascade Microtech MPS150 micro-probing station and a PXIe-4143 source measure unit from National Instruments Corporation to investigate the electrical properties of metal/insulator/metal sandwich structures. We have also succeeded in implementing conditions for the current-voltage characteristics measurements and in simulating procedures for the multiple reading/writing of digital information by means of resistive switching inside the nanostructured layers. We have studied anodized-titanium-dioxide-based Ti/TiO2-NT/Au structures with diameter of 100 micrometers, synthesized by the mask method. For the micromemristors produced, we have estimated the resistance in the low-(<10 kOhm) and high-ohmic (> 50 kOhm) states.

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