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:8/15/2017)... Aug. 15 2017   ivWatch LLC , a medical device ... therapy, today announced receipt of its ISO 13485 Certification, the global ... International Organization for Standardization (ISO®). ... ivWatch Model 400 Continuous Monitoring device for the early detection of ... "This is an important milestone ...
(Date:6/30/2017)... 30, 2017 Today, American Trucking Associations ... of face and eye tracking software, became the ... program. "Artificial intelligence and advanced ... monitor a driver,s attentiveness levels while on the ... to detect fatigue and prevent potential accidents, which ...
(Date:6/14/2017)... PARIS , June 15, 2017  IBM (NYSE: IBM ... the international tech event dedicated to developing collaboration between startups ... on June 15-17. During the event, nine startups will ... deliver value in various industries. ... in the international market, with a 30 percent increase in ...
Breaking Biology News(10 mins):
(Date:10/10/2017)... research firm Parks Associates announced today that Tom Kerber ... Annual Meeting , October 11 in Scottsdale, Arizona . ... how smart safety and security products impact the competitive landscape. ... Parks Associates: Smart Home Devices: Main Purchase Driver ... "The residential security market has experienced continued growth, and the ...
(Date:10/9/2017)... 2017  BioTech Holdings announced today identification and ... ProCell stem cell therapy prevents limb loss in ... demonstrated that treatment with ProCell resulted in more ... compared to standard bone marrow stem cell administration.  ... reduction of therapeutic effect.  ...
(Date:10/9/2017)... ... October 09, 2017 , ... ... journal, Epilepsia, Brain Sentinel’s SPEAC® System which uses the surface electromyography (sEMG) ... tonic-clonic seizures (GTCS) using surface electromyography (sEMG). The prospective multicenter phase III ...
(Date:10/6/2017)... ... October 06, 2017 , ... ... healthcare and technology sector at their fourth annual Conference where founders, investors, innovative ... speakers and the ELEVATE pitch competition showcasing early stage digital health and med ...
Breaking Biology Technology:
Cached News: