Enhanced adhesion by gecko-inspired hierarchical fibrillar adhesives

Michael P. Murphy, Seok Kim, Metin Sitti

Research output: Contribution to journalArticle

Abstract

The complex structures that allow geckos to repeatably adhere to surfaces consist of multilevel branching fibers with specialized tips. We present a novel technique for fabricating similar multilevel structures from polymer materials and demonstrate the fabrication of arrays of two- and three-level structures, wherein each level terminates in flat mushroom-type tips. Adhesion experiments are conducted on two-level fiber arrays on a 12-mm-diameter glass hemisphere, which exhibit both increased adhesion and interface toughness over one-level fiber samples and unstructured control samples. These adhesion enhancements are the result of increased surface conformation as well as increased extension during detachment.

Original languageEnglish (US)
Pages (from-to)849-855
Number of pages7
JournalACS Applied Materials and Interfaces
Volume1
Issue number4
DOIs
StatePublished - Apr 29 2009
Externally publishedYes

Keywords

  • adhesion
  • bioinspired
  • dry adhesive
  • gecko
  • hierarchy

ASJC Scopus subject areas

  • Materials Science(all)

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