Navigation Links
The pitter patter of little feet ... climbing straight up a wall

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
National Science Foundation

Related biology technology :

1. Using catalysts to stamp nanopatterns without ink
2. BIO-key(R) Awarded Contract to Deploy Incident Reporting System for Littleton, CO Police Department
Post Your Comments:
Related Image:
The pitter patter of little feet ... climbing straight up a wall
(Date:6/27/2016)... 2016 /PRNewswire/ - BIOREM Inc. (TSX-V: BRM) ("Biorem" or "the ... major shareholders, Clean Technology Fund I, LP and Clean ... based venture capital funds which together hold approximately ... fully diluted, as converted basis), that they have entered ... equity holdings in Biorem to TUS Holdings Co. Ltd. ...
(Date:6/27/2016)... ... June 27, 2016 , ... Newly created 4Sight Medical ... to the healthcare market. The company's primary focus is on new product introductions, ... strategies that are necessary to help companies efficiently bring their products to market. ...
(Date:6/24/2016)... on a range of subjects including policies, debt and investment ... Speaking at a lecture to the Canadian Economics ... the country,s inflation target, which is set by both the ... "In certain areas there needs to be frequent ... not sit down and address strategy together?" He ...
(Date:6/23/2016)... ... June 23, 2016 , ... Mosio, a ... eBook, “Clinical Trials Patient Recruitment and Retention Tips.” Partnering with experienced clinical research ... by providing practical tips, tools, and strategies for clinical researchers. , “The landscape ...
Breaking Biology Technology:
(Date:6/9/2016)... in attendance control systems is proud to announce the introduction of fingerprint attendance control ... right employees are actually signing in, and to even control the opening of doors. ... ... ... Photo - ...
(Date:6/2/2016)... The Department of Transport Management (DOTM) ... million US Dollar project, for the , Supply ... Enrolment, and IT Infrastructure , to ... implementation of Identity Management Solutions. Numerous renowned international vendors participated ... was selected for the most compliant and innovative ...
(Date:5/24/2016)... , May 24, 2016 Ampronix facilitates superior patient care by providing ...  3D medical LCD display is the latest premium product recently added to the range ... ... ... Sony 3d Imaging- LCD Medical Display- Ampronix News ...
Breaking Biology News(10 mins):