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

Joong Yeon Cho, Gyutae Kim, Sungwook Kim, Heon Lee

Research output: Contribution to journalArticle

8 Citations (Scopus)

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 135° ± 2°, which was slightly lower than that of the original dragonfly's wing (145° ± 2°), but much higher than that of the UV cured polymer surface without any nano-sized pillars (80°). The hydrophobicity was further improved by applying a coating of Teflon-like material.

Original languageEnglish
Pages (from-to)523-526
Number of pages4
JournalElectronic Materials Letters
Volume9
Issue number4
DOIs
Publication statusPublished - 2013 Jul

Keywords

  • PDMS molding
  • SAM coating
  • UV imprint lithography
  • dragonfly wing
  • hydrophobicity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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