Science Fiction
Dictionary
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
 |
Geckel Adhesive Has Gecko-Mussel Foot Power
The gecko: master of dry surface stickiness - if your hand had that much stickum, you could pick up 90 pounds open-handed. The mussel: master of wet surface stickiness - it can stick to Teflon underwater.
(Gecko foot - Mussel foot)
What would you get if you could combine the power of these two masters of adhesion? Geckel, that's what. A new adhesive that actually exhibits strong yet reversible adhesion in wet environments.
“The geckel material should be useful for reversible attachment to a variety of surfaces in any environment,” said Phillip B. Messersmith, professor of biomedical engineering at Northwestern's McCormick School of Engineering and Applied Science and an author of the paper. “I envision that adhesive tapes made out of geckel could be used to replace sutures for wound closure and may also be useful as a water-resistant adhesive for bandages and drug-delivery patches. Such a bandage would remain firmly attached to the skin during bathing but would permit easy removal upon healing.”
Their geckel material can stick through as many as one thousands contact/release cycles (that's a gecko strong point) and perform extremely well underwater with high adhesion (mussel).
Messersmith and Lee imitated a gecko's foot by nanofabricating arrays of silicone pillars that exhibit enough flexibility to adapt to rough surfaces. Next they brought in the mussel power, coating the pillars with a very thin layer of a synthetic polymer, designed by the researchers, that mimics the wet adhesive mussel proteins.The researchers measured the performance of the geckel material using an atomic force microscope. They found that pillar arrays coated with the mussel-mimetic polymer improved wet adhesion 15-fold over uncoated pillar arrays. (The pillars in the arrays tested were 400 nanometers in diameter and 600 nanometers high.)
If you're rooting for slipperiness, learn about the Anti-Adhesive Surfaces of Plants. Read more at Northwestern University.
Scroll down for more stories in the same category. (Story submitted 7/20/2007)
Follow this kind of news @Technovelgy.| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |
Would
you like to contribute a story tip?
It's easy:
Get the URL of the story, and the related sf author, and add
it here.
Comment/Join discussion ( 0 )
Related News Stories - (" Material ")
Harvard Metamaterials Change Structure Instantly
'Annealed in any shape for a time, and codified, the structure of that shape is retained down to the molecules.' - Samuel R. Delany
Nano-Chainmail 2D Mechanically Interlocked Polymer
'Nemourlon armor of reasonable weight resists penetration by most fragments and any bullet that is not both reasonably heavy and fairly high-velocity.' - Jerry Pournelle, 1976.
Goldene - A Two-Dimensional Sheet Of Gold One Atom Thick
'Hasan always pitched a Gauzy - a one-molecule-layer tent, opaque, feather-light, and very tough.' - Roger Zelazny, 1966.
GNoME AI From DeepMind Invents Millions Of New Materials
'...the legendary creativity of our finest human authors pales against the mathematical indefatigability of GNoME.'
Technovelgy (that's tech-novel-gee!) is devoted to the creative science inventions and ideas of sf authors. Look for the Invention Category that interests you, the Glossary, the Invention Timeline, or see what's New.
Science Fiction
Timeline
1600-1899
1900-1939
1940's 1950's
1960's 1970's
1980's 1990's
2000's 2010's
Current News
Robotic Barber Programmed With a Number of Styles
'He found a barber shop which, he thought, would be good for an idle hour.'
Humanoid Boxing Robot KO's Opponent - It's A Knockout!
'Thirty rounds of fighting is tough work. Even for machines.'
Caterpillar Electric Mining Loader Not Yet Ready For Moon
'...the excavations were already in progress, for he saw gray slopes of rubble.'
Centipede Robots Down On The Farm
'...the walking mills of Puffy Products began to tread delicately on their centipede legs across the wheat fields of Kansas.'
Anthropic's Claude AI Creates Legal Citation From Whole Cloth
'Here is a Clerk that would work incessantly, and neither eat, sleep, want payment, or grumble.'
Students Vie For Lunar Regolith Mining Robot Prize
'About time you got here,' the astronaut said.
'They Erased My Memory' Says Ariana Grande
'...using a neutralizing electronic impulse.'
Solitary Black Hole Wanders In Space
'...the Hole is something like a vortex or a whirlpool?'
Spaceplane From Virgin Atlantic
'ZARNAK, YOU'RE TO COMMAND A SCOUTING EXPEDITION --- FIND OUT WHAT THIS IS ALL ABOUT!'
DARPA Wants 'Large Bio-Mechanical Space Structures'
'These are your rudimentary seed packages... Some will combine in place to form more complicated structures.'
Robot Hand Creeps Along, Separate From It's Owner
'The crawling... object was V-Stephen's surgeon-hand...'
Taikonauts Exercise In China's Tiangong Space Station
'Joe got out the gravity-simulator harnesses...'
Korean Exoskeleton Suit F1 Helps You Put It On
'Better late than never.'
Have AI Researchers Given Up On 'Bio-Babies'?
'You couldn't have the capstone without the pyramid to hold it up.'
Bunker Busters and Bore-Pellets
'The first revelation of the new Soviet bore-pellets.'
'Spikeless' Brand Swizzle Stick Detects Spiked Drinks
'the unobtrusive inspections with tiny remote-cast snoopers...'
