Navigation Links
The pitter patter of little feet... climbing straight up a wall
Date:1/29/2008

Building upon several years of research into the gecko's uncanny ability to climb sheer walls, researchers at the University of California, Berkeley, have developed an adhesive that is the first to master the easy attach and easy release of the reptile's padded feet. The material could prove useful for a range of products, from climbing equipment to medical devices.

Unlike duct tape or glue, the new material is crafted from millions of tiny, hard, plastic fibers that establish grip; a mere square two centimeters on a side can support 400 grams (close to a pound). While tape sticks when it presses onto a surface, the new adhesive sticks as it slides on a surface and releases as it lifts -- this is the trick behind a gecko's speedy vertical escapes.

The new study appeared online Jan. 23, 2008, in the Journal of the Royal Society Interface.

There are other synthetic adhesives inspired by gecko feet and they adhere much like conventional tape. In contrast, the new adhesive brushes along a surface to develop traction. While ideal for hanging posters, the characteristic is even more important for any application that requires movement, such as climbing.

"The gecko has a very sophisticated hierarchical structure of compliant toes, microfibers, nanofibers and nanoattachment plates that allows the foot to attach and release with very little effort," said co-author and Berkeley professor Ron Fearing, "The gecko makes it look simple, but the animal needs to control the directions it is moving its toes--correct movement equates to little effort," he said.

The new material is also novel in that it gets stronger with use. In experiments, it tightened its hold as it was rubbed repeatedly against a glass plate. The extra strength is caused by the fibers bending over to make more contact, yet once released, the fibers returned to their original shape. The research team is exploring ways to permanently bend the fibers so that the grip strength is its strongest from the outset, no massaging required.

According to Fearing, the new material is the first to mimic the nature of the gecko's characteristic "non-sticky by default" feet. The Berkeley researchers, all engineers, have worked closely with biologists Robert Full, also at Berkeley, and Kellar Autumn of Lewis and Clark College in Portland, Ore., to uncover the key natural properties behind that unique foot, the secret to high mobility on sheer surfaces.

Fearing and his colleagues are part of an NSF-supported Nanoscale Interdisciplinary Research Team (NIRT) that was specifically tasked in 2003 with developing biologically-inspired synthetic gecko adhesives.

"The results of this project are an impressive example of how teaming engineers with biologists results in a better understanding of the role of 'engineering' in nature," says Lynn Preston, the NSF officer who supported these NIRT researchers, and many other teams of engineers and biologists, through her leadership of NSF's Engineering Research Centers program. "This is a perfect example of how to turn that understanding into products that are as sophisticated as those developed by 'Mother Nature'."


'/>"/>

Contact: Josh Chamot
jchamot@nsf.gov
703-292-7730
National Science Foundation
Source:Eurekalert  

Related medicine news :

1. Brain imaging and genetic studies link thinking patterns to addiction
2. Studies find stable sleep patterns and regular routines may improve outcomes in bipolar disorder
3. Brain patterns of former anorexics reveal clues to disorders lasting impact
4. Casey Family Programs Hires Ken Patterson as Managing Director of Child and Family Services
5. Media availability: low-fat dietary pattern may lower risk of ovarian cancer
6. Muscle patterns in women may be linked to at risk positioning for ACL tears
7. Nicotine in breast milk disrupts infants sleep patterns
8. Rates of bipolar diagnosis in youth rapidly climbing, treatment patterns similar to adults
9. A Little Regular Exercise Extends Mens Lives
10. Drink a Little, Stay Active, Save Your Heart
11. Lack of Strong Thirst Signals Leads Elderly to Drink Too Little
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
The pitter patter of little feet... climbing straight up a wall
(Date:6/26/2016)... ... June 27, 2016 , ... Quality metrics are proliferating in cancer care, and ... in the eye of the beholder, according to experts who offered insights and commentary ... of Managed Care. For the full issue, click here . , For the ...
(Date:6/26/2016)... ... June 26, 2016 , ... Many women are ... with endometriosis. These women need a treatment plan to not only alleviate symptoms ... can help for preservation of fertility and ultimately achieving a pregnancy. The specialists ...
(Date:6/25/2016)... ... June 25, 2016 , ... First Choice Emergency Room , the largest ... as the Medical Director of its new Mesquite-Samuell Farm facility. , “We are ... Mesquite location,” said Dr. James M. Muzzarelli, Executive Medical Director of First Choice Emergency ...
(Date:6/24/2016)... ... June 24, 2016 , ... A recent article published ... unfamiliar with. The article goes on to state that individuals are now more comfortable ... less common operations such as calf and cheek reduction. The Los Angeles area medical ...
(Date:6/24/2016)... ... June 24, 2016 , ... Global law firm Greenberg Traurig, P.A. announced that ... chosen by their peers for this recognition are considered among the top 2 percent ... special honors as members of this year’s Legal Elite Hall of Fame: Miami ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... 24, 2016  Arkis BioSciences, a leading innovator ... more durable cerebrospinal fluid treatments, today announced it ... funding is led by Innova Memphis, followed by ... private investors.  Arkis, new financing will accelerate the ... market release of its in-licensed Endexo® technology. ...
(Date:6/23/2016)... DUBLIN , June 23, 2016 ... "Dialysis Devices Global Market - Forecast to 2022" report ... is the treatment method for the patients with kidney failure, ... and excess fluid from the patient,s blood and thus the ... sodium, potassium and chloride in balance. Increasing ...
(Date:6/23/2016)... 23, 2016 Research and Markets ... Market by Type (Organic Chemical (Sugar, Petrochemical, Glycerin), Inorganic ... Coating, Parenteral) - Global Forecast to 2021" report ... The global pharmaceutical excipients market is projected to ... of 6.1% in the forecast period 2016 to 2021. ...
Breaking Medicine Technology: