Iridescent and Glossy Effect on Polymer Surface Using Micro-/Nanohierarchical Structure: Artificial Queen of the Night Tulip Petals

Jun Ho Oh, Ju Yeon Woo, Sunghwan Jo, Chang-Soo Han

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Many petals in nature have a hierarchical structure that imparts various optical properties. Among these, the petals of the Queen of the Night tulip exhibit an iridescent and glossy color due to the diffraction and scattering of light. Herein, we report a bioinspired micro-/nanohierarchical structure that mimics Queen of the Night tulip petal surfaces. Using a method that combined soft lithography and UV-ozone treatment, we fabricated nanoscale line patterns with a linewidth of 600 nm on microwrinkles of 15 μm width and 3 μm height. Using optical microscopy in the dark-field mode and monochromatic light diffraction measurements, we found that these hierarchical structures on a poly(dimethylsiloxane) (PDMS) substrate synergistically improved the scattering and diffraction effects, unlike the pristine, nano-, and microstructures. In addition, using a dye-colored PDMS material, we fabricated artificial Queen of the Night petals with iridescent and glossy effects. They show great potential for a range of applications, such as coloring, smart displays, dynamic gratings, and light-control devices.

Original languageEnglish
JournalACS Applied Materials and Interfaces
DOIs
Publication statusPublished - 2019 Jan 1

Keywords

  • diffraction
  • hierarchical pattern
  • micro-/nano structure
  • scattering
  • tulip Queen of the Night

ASJC Scopus subject areas

  • Materials Science(all)

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