Functional adhesive surfaces with “gecko” effect: the concept of contact splitting

M.M.G. Kamperman, E. Kroner, A. del Campo, R.M. McMeeking, E. Arzt

Research output: Contribution to journalArticleAcademicpeer-review

171 Citations (Scopus)

Abstract

Nature has developed reversibly adhesive surfaces whose stickiness has attracted much research attention over the last decade. The central lesson from nature is that “patterned” or “fibrillar” surfaces can produce higher adhesion forces to flat and rough substrates than smooth surfaces. This paper critically examines the principles behind fibrillar adhesion from a contact mechanics perspective, where much progress has been made in recent years. The benefits derived from “contact splitting” into fibrils are separated into extrinsic/intrinsic contributions from fibril deformation, adaptability to rough surfaces, size effects due to surface-to-volume ratio, uniformity of stress distribution, and defect-controlled adhesion. Another section covers essential considerations for reliable and reproducible adhesion testing, where better standardization is still required. It is argued that, in view of the large number of parameters, a thorough understanding of adhesion effects is required to enable the fabrication of reliable adhesive surfaces based on biological examples.
Original languageEnglish
Pages (from-to)335-348
Number of pages13
JournalAdvanced Engineering Materials
Volume12
Issue number5
DOIs
Publication statusPublished - 2010

Keywords

  • polymer microfiber arrays
  • biomimetic fibrillar interfaces
  • sliding-induced adhesion
  • carbon nanotube arrays
  • high-aspect-ratio
  • pull-off force
  • enhanced adhesion
  • foot-hair
  • dry adhesive
  • microstructured surfaces

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