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Polymer nanoimprinting using an anodized aluminum mold for structural coloration

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Title: Polymer nanoimprinting using an anodized aluminum mold for structural coloration
Authors: Kikuchi, Tatsuya Browse this author →KAKEN DB
Nishinaga, Osamu Browse this author
Natsui, Shungo Browse this author →KAKEN DB
Suzuki, Ryosuke O. Browse this author →KAKEN DB
Keywords: Anodizing
Anodic porous alumina
Etidronic acid
Structural coloration
Issue Date: 2015
Publisher: Elsevier
Journal Title: Applied Surface Science
Volume: 341
Start Page: 19
End Page: 27
Publisher DOI: 10.1016/j.apsusc.2015.03.007
Abstract: Polymer nanoimprinting of submicrometer-scale dimple arrays with structural coloration was demonstrated. Highly ordered aluminum dimple arrays measuring 530–670 nm in diameter were formed on an aluminum substrate via etidronic acid anodizing at 210–270 V and subsequent anodic oxide dissolution. The nanostructured aluminum surface led to bright structural coloration with a rainbow spectrum, and the reflected wavelength strongly depends on the angle of the specimen and the period of the dimple array. The reflection peak shifts gradually with the dimple diameter toward longer wavelength, reaching 800 nm in wavelength at 670 nm in diameter. The shape of the aluminum dimple arrays were successfully transferred to a mercapto-ester ultra-violet curable polymer via self-assembled monolayer coating and polymer replications using a nanoimprinting technique. The nanostructured polymer surfaces with positively and negatively shaped dimple arrays also exhibited structural coloration based on the periodic nanostructure, and reflected light mostly in the visible region, 400–800 nm. This nanostructuring with structural coloration can be easily realized by simple techniques such as anodizing, SAM coating, and nanoimprinting.
Type: article (author version)
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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