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Replication of surface nano-structure of the wing of dragonfly (Pantala Flavescens) using nano-molding and UV nanoimprint lithography

Authors
Cho, Joong-YeonKim, GyutaeKim, SungwookLee, Heon
Issue Date
7월-2013
Publisher
KOREAN INST METALS MATERIALS
Keywords
dragonfly wing; hydrophobicity; PDMS molding; UV imprint lithography; SAM coating
Citation
ELECTRONIC MATERIALS LETTERS, v.9, no.4, pp.523 - 526
Indexed
SCIE
SCOPUS
KCI
OTHER
Journal Title
ELECTRONIC MATERIALS LETTERS
Volume
9
Number
4
Start Page
523
End Page
526
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/102813
DOI
10.1007/s13391-013-0042-0
ISSN
1738-8090
Abstract
The hydrophobicity of a dragonfly's wing originates from the naturally occurring nano-structure on its surface. The nano-structure on a dragonfly's wing consists of an array of nano-sized pillars, 100 nm in diameter. We re-create this hydrophobicity on various substrates, such as Si, glass, curved acrylic polymer, and flexible PET film, by replicating the nano-structure using UV curable nano-imprint lithography (NIL) and PDMS molding. The success of the nano-structure duplication was confirmed using scanning electron microscopy (SEM). The hydrophobicity was measured by water-based contact angle measurements. The water contact angle of the replica made of UV cured polymer was 135A degrees +/- 2A degrees, which was slightly lower than that of the original dragonfly's wing (145A degrees +/- 2A degrees), but much higher than that of the UV cured polymer surface without any nano-sized pillars (80A degrees). The hydrophobicity was further improved by applying a coating of Teflon-like material.
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Lee, Heon
공과대학 (신소재공학부)
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