Physico-chemical characterization of anodic films on sputter-deposited Al-Nb alloys.

Characterization of the Solid State Properties of Anodic Oxides Grown on Sputter-deposited Al-Nb Alloys.

Tuning of Solid-sate Properties of Al Mixed Oxides Grown on Sputter-deposited Al Alloys.

Tailoring of the solid state properties of Al-Nb mixed oxides: A photoelectrochemical study

Al-Nb containing mixed oxides were grown by anodizing sputter-deposited Al-Nb alloys of different compositions. A photoelectrochemical investigation was carried out in order to estimate the band gap, flat band potential, and conductivity type of these oxides as a function of their composition. The dependence of the band gap on the composition of mixed sp-d metal oxides has been rationalized by using a semiempirical correlation between the difference of electronegativity and band gap of oxides proposed in the literature some years ago and recently tested for regular d-d metal mixed oxides. The band gap increase observed as a function of Al content into the oxides seems mainly depending on th…