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- W1674362014 abstract "Al-Ta mixed oxides were grown by anodizing sputter-deposited Al-Ta alloys of different composition. Photocurrent spectra revealed a band gap, Eg, slightly independent on Ta content and very close to that of anodic Ta2O5 (∼4.3 eV) with the exception of the anodic film on Al-10at% Ta, which resulted to be not photoactive under strong anodic polarization. The photoelectrochemical characterization allowed to estimate also the oxides flat band potential and to get the necessary information to sketch the energetic of the metal/oxide/electrolyte interfaces. Impedance measurements allowed to confirm the formation of insulating material and to estimate the dielectric constant of the oxides, which resulted to be monotonically increasing with increasing Ta content (from 9 for pure Al2O3 to 30 for pure Ta2O5)." @default.
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- W1674362014 date "2015-10-01" @default.
- W1674362014 modified "2023-09-25" @default.
- W1674362014 title "The influence of composition on band gap and dielectric constant of anodic Al-Ta mixed oxides" @default.
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- W1674362014 doi "https://doi.org/10.1016/j.electacta.2015.08.068" @default.
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