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Surface characterization of nanoporous aluminium oxide films synthesized by single-step DC and AC anodization

Chelliah, Nagaraj M and Saxena, Alaukik and Sharma, Khushdeep and Singh, Harpreet and Surappa, MK (2017) Surface characterization of nanoporous aluminium oxide films synthesized by single-step DC and AC anodization. In: Surfaces and Interfaces, 7 . pp. 139-145. ISSN 24680230

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Official URL: https://doi.org/10.1016/j.surfin.2017.04.001


Nanoporous alumina films were synthesized on commercial grade aluminum substrates using single-step anodization technique in 0.3 M phosphoric acid at room temperature. Effect of applied voltage (100–130 V) on surface characteristics of anodized aluminum oxide (AAO) film was investigated. Surface topography parameters and regularity ratio of nanopores arrangement were characterized using power spectral density (PSD) and fast Fourier transform (FFT) profiles. While DC anodization suffered from filament-like cavities at 130 V owing to thermally enhanced dissolution of oxide, AC anodization produced localized flower-like morphology for all the applied voltages. The intensity of localized flower-like morphology was increased monotonically with applied voltage. Evolution of flower-like morphology was discussed on the basis of Pashchanka-Schneider model.

Item Type: Journal Article
Publication: Surfaces and Interfaces
Publisher: Elsevier B.V.
Additional Information: The copyright of this article belongs to the Elsevier B.V.
Keywords: Aluminum oxide; Anodization; Atomic force microscopy (AFM); Fast Fourier transform; Surface morphology
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 31 May 2022 05:32
Last Modified: 31 May 2022 05:32
URI: https://eprints.iisc.ac.in/id/eprint/72901

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