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Synthetic gecko foot-hairs from multiwalled carbon nanotubes Betul Yurdumakan,a

Summary: Synthetic gecko foot-hairs from multiwalled carbon nanotubes
Betul Yurdumakan,a
Nachiket R. Raravikar,b
Pulickel M. Ajayanb
and Ali Dhinojwala*a
Received (in Cambridge, UK) 29th April 2005, Accepted 17th June 2005
First published as an Advance Article on the web 5th July 2005
DOI: 10.1039/b506047h
We report a fabrication process for constructing polymer
surfaces with multiwalled carbon nanotube hairs, with strong
nanometer-level adhesion forces that are 200 times higher than
those observed for gecko foot-hairs.
The mechanism that allows a gecko lizard to climb any vertical
surface and hang from a ceiling with one toe has attracted
considerable interest and awe for over two millennia. Recent
studies have discovered that the gecko's ability to defy gravity
comes from its remarkable feet and toes.1
Each five-toed foot is
covered with microscopic elastic hairs called setae. The ends of
these hairs split into spatulas which come in contact with the


Source: Ajayan, Pulickel M. - Department of Mechanical Engineering and Materials Science, Rice University


Collections: Materials Science