HOME >> BIOLOGY >> NEWS
UC Berkeley study shows gecko foot hairs are amazing dry adhesives

Geckos are able to scurry up walls and across ceilings thanks to two million microscopic hairs on their toes that glom onto surfaces in a way that has given engineers an idea for a novel synthetic adhesive that is both dry and self-cleaning.

In a paper in this week's issue of Nature, University of California, Berkeley, biologist Robert J. Full, Lewis and Clark College biologist Kellar Autumn and their colleagues report the first measurement of the forces that these hairs, or setae (see' tee), exert on a surface.

Working with the "Cadillac" of the gecko world, a Tokay gecko (Gekko gecko) native to Southeast Asia, the team of biologists and engineers showed that the combined adhesive force of all the tiny hairs lining the gecko's toes is 10 times greater than the maximum force reportedly needed to pull a live gecko off the wall. Geckos apparently use only a fraction of the hairs at one time, though they have been known to hang from the ceiling by one toe.

The key seems to be the hundreds to thousands of tiny pads at the tip of each hair. These pads, called spatulae, measure only about ten millionths of an inch across. Yet, they get so close to the surface that weak interactions between molecules in the pad and molecules in the surface become significant. The combined attraction of a billion pads is a thousand times more than the gecko needs to hang on the wall.

"These billion spatulae, which look like broccoli on the tips of the hairs, are outstanding adhesives," said Full, a professor of integrative biology and head of the Poly-PEDAL (Performance, Energetics, Dynamics, Animal Locomotion) Laboratory at UC Berkeley. "Geckos have developed an amazing way of walking that rolls these hairs onto the surface, and then peels them off again, just like tape. But it's better than tape."

"Getting yourself to stick isn't really that difficult, it's getting off that is the problem," noted Autumn, a former postdoctoral student in Full's laboratory who now is
'"/>

Contact: Robert Sanders
rls@pa.urel.berkeley.edu
510-643-6998
University of California - Berkeley
6-Jun-2000


Page: 1 2 3 4

Related biology news :

1. Landmark gene agreement announced by Samoan government and UC Berkeley for anti-AIDS drug Prostratin
2. Landmark agreement between Samoa and UC Berkeley could help search for AIDS cure
3. Berkeley Lab soil scientist Margaret Torn receives Presidential Early Career Award
4. MSU group reviews Berkeley venture into brave new science funding world
5. UC Berkeley museum biologists to repeat 85-year-old Yosemite National Park wildlife survey
6. Berkeley scientists create first 3-D map of protein universe
7. UC Berkeley scientists detail neural circuit that lets eye detect directional motion
8. UC Berkeley, Joint Genome Institute target chloroplasts for clues to green plant evolution
9. Your brain is teaching your nose new tricks, say UC Berkeley researchers
10. UC Berkeley researchers are developing a microsized microscope that can peek inside living cells
11. Dietary supplements make old rats youthful, may help rejuvenate aging humans, according to UC Berkeley study

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/9/2016)... 2016 This BCC Research report provides an ... RNA Sequencing (RNA Seq) market for the years 2015, ... and reagents, data analysis, and services. Use ... RNA-Sequencing market such as RNA-Sequencing tools and reagents, RNA-Sequencing ... affecting each segment and forecast their market growth, future ...
(Date:3/9/2016)... GARDENS, Fla. , March 9, 2016 /PRNewswire/ ... management authentication and enrollment solutions, today announced the ... DigitalPersona ® Altus multi-factor authentication platform. ... and InfoSec managers to step-up security where it,s ... Washington, DC . ...
(Date:3/3/2016)... March 3, 2016  FlexTech, a SEMI Strategic Association ... Innovation, Research & Development, Leadership in Education, and, in ... the 9 th year of the FLEXI Awards ... and individuals from past years . Judging was ... pre-described set of criteria, by a panel of non-affiliated, ...
Breaking Biology News(10 mins):
(Date:5/25/2016)... ... May 25, 2016 , ... Lady had been battling arthritis since the ... in her left knee. Lady’s owner Hannah sought the help of Dr Jeff Christiansen ... to repair her cruciate ligament and help with the pain of Lady’s arthritis. Dr ...
(Date:5/24/2016)... ... May 24, 2016 , ... Last week, Callan Capital, an integrated ... entrepreneurs, held The Future of San Diego Life Science event at the Estancia La ... community attended the event with speakers Dr. Rich Heyman, former CEO of Aragon and ...
(Date:5/23/2016)... , May 23, 2016 Zimmer Biomet Holdings, ... healthcare, today announced that its Board of Directors has approved ... the second quarter of 2016. The cash ... about July 29, 2016 to stockholders of record as of ... of dividends are subject to approval of the Board of ...
(Date:5/23/2016)... ... May 23, 2016 , ... Foresight Institute , ... the winners for the 2015 Foresight Institute Feynman Prizes. , These prestigious ... categories, one for experiment and the other for theory in nanotechnology. Prof. Markus ...
Breaking Biology Technology:
Cached News: