Effects of contact shape on biological wet adhesion

Yewang Su, Baohua Ji*, Yonggang Huang, Kehchih Hwang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


Wet adhesion is widely adopted in biological adhesion systems in nature. Wet adhesion is studied in this paper with the focus on the effect of different contact shapes (flat, concave, convex, and ring-like) on the adhesion force. The evolution of the liquid bridge between a fiber tip and substrate during the detaching process shows two transition points. The first transition from the radius-controlled to the contact-angle controlled process is critical to influence the strength and robustness of adhesion. We show that a concave shape is more effective than a flat one, while a convex shape has no advantage. A ring-like contact shape has advantages in a hydrophobic environment and on a rough surface.

Original languageEnglish (US)
Pages (from-to)8885-8893
Number of pages9
JournalJournal of Materials Science
Issue number21
StatePublished - Nov 1 2007

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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