Geckos are able to climb walls thanks to a coating on their toes of tiny hairs, called "setae," that are tipped with flat "spatulae." The large surface area of the spatulae exploit the van der Waals force, the weak attractive force between molecules, enabling the gecko's feet to stick. For years, scientists have worked on the development of synthetic adhesives inspired by this wonder of nature. Researchers at the University of Dayton and the Georgia Institute of Technology have now made an array of artificial setae that are actually nested carbon nanotubes. Eventually, the resarchers think the material could replace solder as well as more traditional adhesives. From New Scientist:
(The researchers) controlled the (carbon nanotube) growth process to make a forest of vertical nanotube trunks turning into a canopy of tangled ends on top. The curly entangled mess acts like natural spatulae – when pressed against a surface, they have a large contact area and hence a strong hold.
The new material was tested for stickiness on surfaces ranging from Teflon to sandpaper. Attached to a glass surface, a single square centimetre of it can support over 1600 grams when pulled roughly parallel to the surface.
That is roughly 10 times better than some species of gecko and three times better than the best artificial competitor.
But removing a pad of the material is simple, unlike some rival materials. Pulling it perpendicular to a surface means only the tips of the nanotubes remain in contact with the surface, and the setae will easily loosen their grip. A weight of 160 grams on a square centimetre is enough to do that.
"Gecko-grip material aims to be the end of glue
Today a future without schools. Instead of gathering students into a room and teaching them, everybody learns on their own time, on tablets and guided by artificial intelligence. Flash Forward: RSS | iTunes | Twitter | Facebook | Web | Patreon | RedditIn this episode we talk to a computer scientist who developed an artificially […]
Where are our petabyte drives? Brian Hayes takes us through the reasons storage is “stuck” in the low terabytes. The tl;dr is that we got such exceptional capacity growth in the late 90s and early 00s we don’t need much more right now, so the focus since then has been on SSDs, networking, interfaces, etc, […]
Amélie Lamont, a former staffer at website-hosting startup Squarespace, writes that she often found herself disregarded and disrespected by her colleagues. One comment in particular, though, set her reeling — and came to exemplify her experiences there.
Looks like all of your potential employers are hiring candidates with programming skills (which you don’t have). With all of the languages out there today, it’s tough to know where to start.With the Complete Front-End to Back-End Coding Bundle, you can beef your resume up in all the right places, no confusion necessary. This package of […]
Those of us who love music wish we could listen to it 24/7. But it’s impossible when we’re trying to converse with our friends, or when are swimming in the local pool.That is, until now. The KOAR Bone Conduction Bluetooth Headset, now 48% off, has changed the audio game.Made with lightweight titanium memory metal, this headset boasts patented bone conduction technology to transport sound […]
It’s one thing to enjoy dinner at home and a nice glass of Cabernet Sauvignon with your best friend, Netflix, but it’s another thing entirely to make that meal from scratch and get that wine delivered right to your doorstep.But what if we told you there’s a way to make this possible? To keep your social life, […]