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Self-ordered Porous Alumina Fabricated via Phosphonic Acid Anodizing

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Title: Self-ordered Porous Alumina Fabricated via Phosphonic Acid Anodizing
Authors: Akiya, Shunta Browse this author
Kikuchi, Tatsuya Browse this author →KAKEN DB
Natsui, Shungo Browse this author →KAKEN DB
Sakaguchi, Norihito Browse this author →KAKEN DB
Suzuki, Ryosuke O. Browse this author →KAKEN DB
Keywords: Anodizing
Porous Alumina
Phosphonic Acid
Self-ordering
Nanostructure
Issue Date: 1-Feb-2016
Publisher: Elsevier
Journal Title: Electrochimica acta
Volume: 190
Start Page: 471
End Page: 479
Publisher DOI: 10.1016/j.electacta.2015.12.162
Abstract: Self-ordered periodic porous alumina with an undiscovered cell diameter was fabricated via electrochemical anodizing in a new electrolyte, phosphonic acid (H3PO3). High-purity aluminum plates were anodized in phosphonic acid solution under various operating conditions of voltage, temperature, concentration, and anodizing time. Phosphonic acid anodizing at 150-180 V caused the self-ordering behavior of porous alumina, and an ideal honeycomb nanostructure measuring 370-440 nm in cell diameter was successfully fabricated on the aluminum substrate. Conversely, disordered porous alumina grew at below 140 V, and anodizing at above 190 V caused local thickening due to oxide burning. Two-step phosphonic acid anodizing allows the fabrication of high aspect ratio ordered porous alumina. HPO32 anions originated from the electrolyte were incorporated into the porous oxide during anodizing. Consequently, a double-layered porous alumina consisting of a thick outer layer containing incorporated HPO32 anions, and a thin inner layer without anions was constructed via phosphonic acid anodizing.
Rights: © 2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
https://creativecommons.org/licenses/by-nc-nd/4.0/
Type: article (author version)
URI: http://hdl.handle.net/2115/68240
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 菊地 竜也

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