TY - JOUR
T1 - Polymer nanoimprinting using an anodized aluminum mold for structural coloration
AU - Kikuchi, Tatsuya
AU - Nishinaga, Osamu
AU - Natsui, Shungo
AU - Suzuki, Ryosuke O.
N1 - Funding Information:
This study was conducted at Hokkaido University and was supported by the “Nanotechnology Platform” Program of the Ministry of Education, Culture, Sports, Science, and Technology (MEXT), Japan. The work was financially supported by the Japan Society for the Promotion of Science ( JSPS ) “KAKENHI” ( 24686080 ) and Toyota Physical & Chemical Research Institute Scholars .
Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.
PY - 2015/6/30
Y1 - 2015/6/30
N2 - 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.
AB - 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.
KW - Anodic porous alumina
KW - Anodizing
KW - Etidronic acid
KW - Nanoimprinting
KW - Structural coloration
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U2 - 10.1016/j.apsusc.2015.03.007
DO - 10.1016/j.apsusc.2015.03.007
M3 - Article
AN - SCOPUS:84926307499
VL - 341
SP - 19
EP - 27
JO - Applied Surface Science
JF - Applied Surface Science
SN - 0169-4332
ER -