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Photoluminescence from Anodic Aluminum Oxide Formed via Etidronic Acid Anodizing and Enhancing the Intensity

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Title: Photoluminescence from Anodic Aluminum Oxide Formed via Etidronic Acid Anodizing and Enhancing the Intensity
Authors: Kikuchi, Tatsuya Browse this author →KAKEN DB
Akiya, Shunta Browse this author
Kunimoto, Kaito Browse this author
Suzuki, Ryosuke O. Browse this author →KAKEN DB
Natsui, Shungo Browse this author →KAKEN DB
Keywords: aluminum
anodic aluminum oxide
etidronic acid
Issue Date: 1-Jun-2020
Publisher: Japan Institute Metals and Materials
Journal Title: Materials transactions
Volume: 61
Issue: 6
Start Page: 1130
End Page: 1137
Publisher DOI: 10.2320/matertrans.MT-M2020010
Abstract: Photoluminescence (PL) emission from anodic aluminum oxide (AAO) formed by etidronic acid anodizing was investigated via fluorescence spectroscopy. Highly pure aluminum plates were anodized in an etidronic acid solution under various operating conditions. PL emission from the typical AAO film was identified with an approximately 250-275-nm range in excitation and a 375-450-nm range in emission, and this distribution was greatly different from the AAO film formed by typical carboxylic acid treatment. The PL intensity increased with the decrease of the concentration of etidronic acid solution. The intensity also increased with anodizing time and subsequent thermal treatment, whereas excess anodizing and high temperature treatment caused an intensity decrease. The AAO film consisted of an outer oxide containing incorporated etidronate anions and a thin honeycomb inner oxide without anions, and the oxygen vacancy localized in the AAO film and anion distribution strongly affected the PL intensity. The appropriate operating condition through anodizing in 0.05M etidronic acid for 40 h and subsequent thermal treatment at 773K for 2 h caused the maximum enhancement of the PL emission.
Type: article
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)

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