Fibrillar Elastomeric Micropatterns Create Tunable Adhesion Even to Rough Surfaces

Viktoriia Barreau, René Hensel, Nathalie K. Guimard, Animangsu Ghatak, Robert M. Mcmeeking, Eduard Arzt*

*Corresponding author for this work

Research output: Contribution to journalArticle

38 Citations (Scopus)
7 Downloads (Pure)

Abstract

Biologically inspired, fibrillar dry adhesives continue to attract much attention as they are instrumental for emerging applications and technologies. To date, the adhesion of micropatterned gecko-inspired surfaces has predominantly been tested on stiff, smooth substrates. However, all natural and almost all artificial surfaces have roughnesses on one or more different length scales. In the present approach, micropillar-patterned PDMS surfaces with superior adhesion to glass substrates with different roughnesses are designed and analyzed. The results reveal for the first time adhesive and nonadhesive states depending on the micropillar geometry relative to the surface roughness profile. The data obtained further demonstrate that, in the adhesive regime, fibrillar gecko-inspired adhesive structures can be used with advantage on rough surfaces; this finding may open up new applications in the fields of robotics, biomedicine, and space exploration.

Original languageEnglish
Pages (from-to)4687-4694
Number of pages8
JournalAdvanced Functional Materials
Volume26
Issue number26
Early online date9 May 2016
DOIs
Publication statusPublished - 12 Jul 2016

Keywords

  • Adhesion
  • Fibrillar dry adhesives
  • Gecko-inspired
  • Surface roughness

ASJC Scopus subject areas

  • Biomaterials
  • Electrochemistry
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

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