Cicada-Wing-Inspired Self-Cleaning Antireflection Coatings on Polymer Substrates.
The cicada has transparent wings with remarkable self-cleaning properties and high transmittance over the whole visible spectral range, which is derived from periodic conical structures covering the wing surface. Here we report a scalable self-assembly technique for fabricating multifunctional optical coatings that mimic cicada-wing structures. Spin-coated two-dimensional non-close-packed colloidal crystals are utilized as etching masks to pattern subwavelength-structured cone arrays directly on polymer substrates. The resulting gratings exhibit broadband antireflection performance and superhydrophobic properties after surface modification. The dependence of the cone shape and size on the antireflective and self-cleaning properties has also been investigated in this study.
Department of Chemical Engineering, National Chung Hsing University , 250 Kuo-Kuang Road, Taichung 40227, Taiwan.
Ying-Chu
YC
Chen
Department of Chemical Engineering, National Chung Hsing University , 250 Kuo-Kuang Road, Taichung 40227, Taiwan.
Zhe-Sheng
ZS
Huang
Department of Chemical Engineering, National Chung Hsing University , 250 Kuo-Kuang Road, Taichung 40227, Taiwan.
Hongta
H
Yang
D000818:Animals; D020099:Coated Materials, Biocompatible / Q000494:pharmacology*; D006430:Hemiptera / Q000033:anatomy & histology*; D057927:Hydrophobic and Hydrophilic Interactions; D055620:Optical Phenomena; D011093:Polyethylene Terephthalates / Q000737:chemistry; D011108:Polymers / Q000494:pharmacology*; D013057:Spectrum Analysis; D014867:Water; D014921:Wings, Animal / Q000033:anatomy & histology* / Q000648:ultrastructure
D020099:Coated Materials, Biocompatible; D011093:Polyethylene Terephthalates; D011108:Polymers; D014867:Water
antireflection; cicada wing; colloidal crystal; self-assembly; self-cleaning