Stooped Nanohairs: Geometry-Controllable, Unidirectional, Reversible, and Robust Gecko-like Dry Adhesive

Tae-il Kim, Hoon Eui Jeong, Kahp Y. Suh, Hong H. Lee

Research output: Contribution to journalArticlepeer-review

143 Scopus citations

Abstract

A study was conducted to demonstrate a simple method for fabricating stopped high-aspect-ratio (AR) nanohairs of polyurethane acrylate (PUA) material that utilized replica molding and post-electron-beam irradiation. The method offered a facile route to prepare angled polymer nanohairs without multistep processes or surface treatment. It was demonstrated that the PUA material was molded into a geometry controlled and high-density nanochair surface with an AR of up to 10 without facing self-matting problem, due to its favorable mechanical properties. The as-formed hairy structures also allowed for structural transformation into directional and angled nanohairs, while maintaining better adhesion capability. The nanohair surface also showed significant unidirectional adhesion properties and a higher shear adhesion due to its structural similarity to natural gecko foot hairs.
Original languageEnglish (US)
Pages (from-to)2276-2281
Number of pages6
JournalAdvanced Materials
Volume21
Issue number22
DOIs
StatePublished - Jun 12 2009
Externally publishedYes

Fingerprint

Dive into the research topics of 'Stooped Nanohairs: Geometry-Controllable, Unidirectional, Reversible, and Robust Gecko-like Dry Adhesive'. Together they form a unique fingerprint.

Cite this