Replication of rose-petal surface structure using UV-nanoimprint lithography

Soyoung Choo, Hak Jong Choi, Heon Lee

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Rose-petal surface consists of a hierarchical structure of microscale papillae and nanofolds. With this micro-nanostructure and surface energy, rose petals exhibit a special property: drops on the petal surface are spherical and do not slide when a petal is held upside down. We replicated the rose-petal surface structure by employing a UV nanomolding process using polyurethane acrylate (PUA) for the first replica and perfluoropolyether (PFPE) for the second replica. PFPE micro-nanostructures, which were identical to the rose-petal hierarchical structure, were formed on a glass substrate. The water contact angle of 144° and contact-angle hysteresis of 83 confirmed that the surface of the glass substrate exhibited a high adhesive force and superhydrophobicity.

Original languageEnglish
Pages (from-to)170-173
Number of pages4
JournalMaterials Letters
Volume121
DOIs
Publication statusPublished - 2014 Apr 15

Keywords

  • Adhesion
  • Biomimetic
  • Petal effect
  • UV-molding
  • Wenzel-Cassie state

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

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