Recent Event Highlights: GECKO-COATING - Adhering without being sticky, Science in Action: Octopus Tool-Use, How sticky is your gecko? Discovery by Duncan Irschick, Gravity governs gecko's grip, Gecko's grip governed by gravity, Angled Surfaces Trigger Gecko's Super-Strong Grip, and 20 more...
Created by dipity on Apr 6, 2010
Last updated: 10/30/10 at 11:26 PM
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Stanford's stickybot climbs various surfaces using a dry adhesive and techniques mimicked from Gecko biology.
Analyses Geckos are little masters as far as adhesion is concerned; they seem to even easily annul defined gravitational laws. Why are they able to do that? The answer: Tiny nanohair on their feet help geckos to build up mechanical grip on extremely smooth surfaces and to defy gravity. According to scientific estimations, geckos have 6.5m hairs on each of the 4 toes. Costly examinations have been made to measure the adhesive power. Scientists found that the nanohair on geckos toes create countless contacts to smooth surfaces. The results are Van-der-Waals forces, an inconceivably tiny adhesive power in the molecular range. Geckos are thus able to activate a total adhesive power of 10 times their body weight. Nature uses this technique of adhesive power several times. Insects too make use of it. Geckos, however, are the champions in their class! Implementation A fascinating solution of nature that is worth having a closer look at and considering it in technical applications. RUDOLF groups textile coating division has orientated itself according to nature for quite some time. Thus, we have succeeded in developing a new adhesive system for textile surfaces that imitates the geckos properties. To improve adhesion to smooth surfaces without using adhesive systems is an important challenge to many textiles. As described above, gecko coatings with countless adhesive points, especially on smooth materials such as glass (see fig.), wood or varnished surfaces, create adhesive power ...
The octopus is widely regarded as the worlds smartest invertebrate, and now a new study adds evidence to that claim.
This is a preview of a show available now on DVD about Duncan Irschick, a scientist at the University of Massachusetts at Amherst, who first discovered how much force a gecko's toepads could produce. His work has pioneered the study of biomimetics. It looks like a cool show!
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...and ceilings of almost all surfaces. But unlike most animal adhesion systems, which involve claws or sticky residue, the gecko's adhesion system uses a reversible molecular attraction, according to an earlier study. When you touch the gecko pad, it's not sticky....
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Louisville Courier-Journal
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http://www.courier-journal.com/article/20090831/FEATURES/908310320/1010/rss04
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...and ceilings of almost all surfaces. But unlike most animal adhesion systems, which involve claws or sticky residue, the gecko's adhesion system uses a reversible molecular attraction, according to an earlier study. "When you touch the gecko pad it's not sticky....
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bookofjoe
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http://www.bookofjoe.com/2009/08/geckos-grip-governed-by-gravity-.html
Excerpt
...and ceilings of almost all surfaces. But unlike most animal adhesion systems, which involve claws or sticky residue, the gecko's adhesion system uses a reversible molecular attraction, according to an earlier study. "When you touch the gecko pad it's not sticky....
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The Washington Post
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http://feeds.washingtonpost.com/click.phdo?i=98e6e648cd4246e8467973a58cd536fb
Interview with Kellar Autumn about gecko adhesion
Bio-inspiration is when engineers and scientists look to nature for ideas. Locally, researchers at UC Berkeley are developing an uber-adhesive based on a geckos feet.
Toshiba exploravision and NSTA Competition Song: Stay Crunchy Artist: Ronald Jenkees
New ski touring fur without glue. It works only through adhesion with outstanding handling because it doesn't stick together. You will love the combination of performance and easy handling.
Behind the scenes of Discovery Channel's Prototype This from the Gecko Superhuman Suit episode. We were given a demonstration of this electrostatic adhesion robot created by the folks at SRI in California. This video shows the robot climbing up a vertical surface created by segments of varying materials. More info here: www.grandideastudio.com
This is a clip from Weird Connections documenting research on a gecko inspired climbing robot. Scientists discover the principles by which a gecko sticks to objects and use nanotechnology to invent an adhesive that works even better than the gecko's feet.
Gecko on a window pane in Hawaii lifts foot by curling his toes backward to release them from the glass. After he moves his foot, he relaxes the toes allowing them to come into contact with the glass again. The toes stick to the glass with the molecular attraction of millions of tiny hairs on the bottom of the toes attracting them to the glass. It is called the Van der Waals force. It is so strong that one foot will hold twice the gecko's weight. To allow the gecko to lift his foot, he has to curl it backwards, releasing only a few hundred hairs at a time until the whole foot is released. A BBC article explaining this is at: news.bbc.co.uk
Lyn Verinsky climbs the UCOP office testing a newly developed Gecko adhesive created by UC Berkeley researchers.
Lyn Verinsky (my sister) climbs a building and becomes the first person to emulate a gecko using crazy gecko-like wall climbing things. :)
Nano tubes should be grown on a microfibrous metal oxide substrate to develop maximum strength in adhesive contacts. By growing the nanotubes on fibrous oxide substrates such as those typically produced for adhesive bonding of aluminium copper and titanium, local contact stresses will enhance adhesion of nanotube fibrils against a substrate without the need for excessive pressure. (wetting and spreading of the nanotubes on the substrate to which they are being bonded will of itself develop a contact pressure without an externally applied pressure being required to produce adequate adhesion). Although the net surface area of contact will be reduced, nanotube bundles will adhere in localised areas so as to resist a combination of normal and shear stresses. In addition the incomplete wetting of the substrate by the nanotubes will reduce the hydrostatic component of tension responsible for the weakness of nanotube adhesion in pure tension which is the major source of weakness of adhesives which rely purely upon van der waals bonds)...{such nano tube joints would also be good for bonding rocket and missile motor parts where high temperatures are involved} If a high voltage was struck between the nano tubes and the surface to be bonded it might be possible to weld suraces together irrespective of their chemical or physical structure.(.....................................................................Nano管が粘着性の取引の最大の力を発展させるためにmicrofibrous金属酸化物基質 ...
Read more: www.newscientist.com Carbon material gives more grip than gecko feet. Deepest-living fishes caught on camera for the first time. Digital zebrafish embryo provides the first complete developmental blueprint of a vertebrate.
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...uses carbon nanotubes (CNTs), one that improves on the absolute adhesion of the previous state of the art. The mechanisms for adhesion and the concepts that inspired this latest gecko adhesive remain the same so, rather than spending time explaining the mechanics...
Source Info
Ars Technica
http://feedproxy.google.com/~r/arstechnica/journals/~3/UUTZYTi3Aq8/gecko-adhesive-redux-carbon-nanotube-edition
Read more: www.newscientist.com Carbon material gives more grip than gecko feet
Heat bulbs are the best way to heat your gecko's cage. Learn how to care for a leopard gecko from an industry professional in this free pet care video. Expert: Cordell Jacques Bio: Cordell Jaques currently works at Huron Pet Supply in Ann Arbor, Mich. and has worked in the pet industry for about 10 years. Filmmaker: Travis Waack
My Yemen Chameleon. Just a bunch of clips that i thought i'd put to gether into a video! handling, feeding, pics, MUSIC!
как один геккон полинял, а другой съел улики
Robotic gecko climbing up glass and a nice monotonous voice-over that explains the science behind the machine.
cmu's Waalbot climbing on vertical smooth acrylic and steering pressure sensitive polymer adhesive feet. More info here: nanolab.me.cmu.edu
From New Orleans - Dozing off during the day may lead to a higher risk of stroke among older adults. Researchers looked at over 2000 participants and found that those who unintentionally nodded off the most had a 4.5-fold higher risk of stroke, and those who indicated they dozed off occasionally had a 2.6-fold greater risk. The study did not find a significant association between sleeping during the day and death from all causes. From London - Health experts may be looking in the wrong places for the next major disease outbreak. Researchers analyzed 335 diseases and used a computer model to narrow down hotspots around the world where future outbreaks were more likely to start. Areas of central America, tropical Africa and south Asia were found to have the highest risk, yet a significant portion of health resources are focused on developed countries. And finally, from Massachusetts - Researchers at MIT have developed a new adhesive surgical bandage inspired by the feet of geckos. In order to be used for medical applications, the new adhesive had to be biocompatible, biodegradable, and elastic. This was achieved by designing the adhesive using micropatterning technology to create a surface not unlike the "hill and valley" profile found in the feet of geckos. The new bandage could replace the glues, sutures and staples currently used by surgeons. For Insidermedicine in 60, I'm Dr. Susan Sharma.
Biochemistry II (Prof. Graham Walker) View the complete course: ocw.mit.edu License: Creative Commons BY-NC-SA More information at ocw.mit.edu More courses at ocw.mit.edu
Biochemistry III (Prof. Graham Walker) View the complete course: ocw.mit.edu License: Creative Commons BY-NC-SA More information at ocw.mit.edu More courses at ocw.mit.edu
Conventional adhesive tape sticks when pressed on a surface. A new gecko-inspired synthetic adhesive (GSA) does not stick when it is pressed into a surface, but instead sticks when it slides on the surface. A similar directional adhesion effect allows real geckos to run up walls while rapidly attaching and detaching toes. The gecko-inspired adhesive uses hard plastic microfibers. The plastic is not itself sticky, but the millions of microscopic contacts work together to adhere. The number of contacts automatically increases to handle higher loads. A feature of the hard plastic gecko-inspired adhesive is that no residue is left on surfaces as is left by conventional adhesive tapes. See robotics.eecs.berkeley.edu
Read it all please. *********************** The tips of the gecko's toes are covered with thin leaves of skin, just like the pages of a book. Every leaf, in turn, is covered in a special tissue known as setae, hair-like protuberances, whose ends are divided into thousands of microscopic tips. On the gecko's toe, an area the size of a pinhead contains an average of 5000 micro-hairs. That means each of the animal's feet contains around half a million hairs. Every single hair consists of between 400 and 1000 protrusions, all located in such a way as to face the animal's heels. The tip of each one is about 5000th of a millimeter thick. The millions of microscopic tips on the gecko's feet use the gravitational force of the atoms in the surface it walks on to firmly adhere to that surface. As the gecko walks, it places the soles of its feet on the surface and pulls them slightly backwards, ensuring maximum contact between the hairs and the surface. Its hairs cling tightly to microscopic protrusions and cavities on the surface, too small to be seen with the naked eye. Thus on the molecular level, a slight gravitational attraction forms between the foot and the surface, known as the Van der Waals Force in quantum physics. This force is also present when you place your hand on the wall, but it is very weak. If you were to view your hand at the atomic level, you would see that its surface is covered in tiny crests, and only the few atoms at the tops of these crests make actual ...
Mr. Fristers vivarium. 22x29x36cm 10mm glass, glued with UV glue. Stainless steel hinges 15W compact flourescent lighting Aluminium reflector Coco panel wall substrate
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...studies suggest that geckos can hold hundreds of times their own body weight. In 2002, US research suggested this adhesion in geckos was due to very weak intermolecular forces produced by the billions of hair-like structures which are arranged in...
Source Info
BBC News
http://news.bbc.co.uk/go/rss/-/1/hi/sci/tech/6967474.stm
Jose s ROBIO 2006 presentation on gecko part 2 forward-referencing: Electroadhesive Robots—Wall Climbing Robots Enabled by a Novel, Robust, and Electrically Controllable Adhesion Technology Harsha Prahlad, Ron Pelrine, Scott Stanford, John Marlow, and Roy Kornbluh
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...created a sticky tape based on a Gecko's foot. The invention followed the discovery by US scientists of how geckos perform their extraordinary climbing feats. The University of California team showed that the adhesion was due to very weak...
Source Info
BBC News
http://news.bbc.co.uk/go/rss/-/1/hi/sci/tech/5217240.stm
Geckos can climb up walls and across ceilings thanks to the millions of tiny hairs, or setae, on the surface of their feet. Each of these hairs is attracted to the wall by an intermolecular force called the van der Waals force, and this allows the gecko's feet to adhere. Stickybot, developed by Mark Cutkosky and his team at Stanford University in California, has feet with synthetic setae made of an elastomer. These tiny polymer pads ensure a large area of contact between the feet and the wall, maximising the van der Waals stickiness. The Pentagon is interested in developing gecko-inspired climbing gloves and shoes. Cutkosky says a Stickybot-type robot would also make an adept planetary rover or rescue bot.
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