Abstract
The effect of the duration of electrochemical anodic oxidation on the formation of nanoporous anodic oxide films on high-purity aluminum (99.99%) in a sulfuric acid solution is studied. The resulting oxide film is analyzed using an atomic force microscope. The method of photoelectric polarization (PEP) and X-ray analysis revealed that these films are sesquioxides of aluminum with variable compositions, nonstoichiometry due to a metal deficiency, and p-type conductivity. The mechanism of the formation of a regular nanoporous oxide structure that results from the nonstoichiometry relation and the intrinsic formation of defects in the oxide is proposed.
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Original Russian Text © A.I. Shcherbakov, E.K. Oshe, I.B. Skvortsova, G.P. Chernova, V.I. Zolotarevskii, 2011, published in Fizikokhimiya Poverkhnosti i Zashchita Materialov, 2011, Vol. 47, No. 2, pp. 176–180.
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Shcherbakov, A.I., Oshe, E.K., Skvortsova, I.B. et al. Formation of nanoporous anodic films on pure aluminum in sulfuric acid. Prot Met Phys Chem Surf 47, 203–207 (2011). https://doi.org/10.1134/S2070205111020171
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DOI: https://doi.org/10.1134/S2070205111020171