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

 

MIT's New Super Slippery Surface

MIT scientists have created a new kind of hydrophobic material that is incredibly slippery, beating existing hydrophobic surfaces by a factor of 10,000.


(Enhanced Condensation on Lubricant-Impregnated Nanotextured Surfaces video)

The key to the improved hydrophobic (water-shedding) surface is a combination of microscopic patterning—a surface covered with tiny bumps or posts just 10 um across, about the size of a red blood cell—and a coating of a lubricant, such as oil. The tiny spaces between the posts hold the oil in place through capillary action, the researchers found.

The team discovered that droplets of water condensing on this surface moved 10,000 times faster than on surfaces with just the hydrophobic patterning. The speed of this droplet motion is key to allowing the droplets to fall from the surface so that new ones can form, increasing the efficiency of heat transfer in a power plant condenser, or the rate of water production in a desalination plant.

With this new treatment, "drops can glide on the surface," Varanasi says, floating like pucks on an air-hockey table and looking like hovering UFOs—a behavior Varanasi says he has never seen in more than a decade of work on hydrophobic surfaces. "These are just crazy velocities."

The amount of lubricant required is minimal: It forms a thin coating, and is securely pinned in place by the posts. Any lubricant that is lost is easily replaced from a small reservoir at the edge of the surface. The lubricant can be designed to have such low vapor pressure that, Varanasi says, "You can even put it in a vacuum, and it won't evaporate."

In Frank Herbert's 1965 novel Dune, Dune has no surface water; all water is precious and is carefully measured and stored, so the native Fremen perfected a water repellent surface:

A splashing sounded on her left. She looked down the shadowy line of Fremen, saw Stilgar with Paul standing beside him and the watermasters emptying their load into the pool through a flowmeter. The meter was a round gray eye above the pool's rim. She saw its glowing pointer move as the water flowed through it, saw the pointer stop at thirty-three liters, seven and three-thirty-seconds drachms.

Superb accuracy in water measurement, Jessica thought. And she noted that the walls of the meter trough held no trace of moisture after the water's passage. The water flowed off those walls without binding tension. She saw a profound clue to Fremen technology in the simple fact: they were perfectionists.

Via RNDMag.

Scroll down for more stories in the same category. (Story submitted 10/24/2012)

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 ( 3 )

Related News Stories - (" Material ")

GNoME AI From DeepMind Invents Millions Of New Materials
'...the legendary creativity of our finest human authors pales against the mathematical indefatigability of GNoME.'

Omniphobic Liquid-like Surfaces And de Camp's Telelubricator (1940)
'So the surface, to the depth of a few molecules, is put in the condition of a supercooled liquid as long as the beam is focused on it.' - L. Sprague de Camp, 1940.

MXenes - Atomic-Thin Metal Sheets Now Easier To Make
'...a rolled-up sheet of a thin, dark metal strange to them.' - John Edwards, 1934.

Do We Still Need Orbiting Factories?
'... his contract with Space Industries required him to work summers in their orbital factory complex.' - Jerry Pournelle, 1976.

 

Google
  Web TechNovelgy.com   

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

Ulm Sleep Pods For The Homeless
'The lid lifted and she crawled inside...'

Prophetic Offers Lucid Dreaming Halo With Morpheus-1 AI
''Leads trail away from insertion points on her face and wrist... to a lucid dreamer...'

More Like A Tumblebug Than A Motorcycle
'It is about the size and shape of a kitchen stool, gyro-stabilized on a single wheel...'

Tesla Camera-Only Vision Predicted In 1930's SF
'By its means, the machine can see.'

First Ever Proof Of Water On Asteroids
'Yes, strangely enough there was still sufficient water beneath the surface of Vesta.'

Aptera Solar EV More Stylish Than Heinlein Steel Tortoise
'When confronted by hills, or rough terrain, it did not stop, but simply slowed until the task demanded equaled its steady power output.'

Gigantic Space Sunshade Would Fight Global Warming
'...the light of the sun had been polarized by two crossed fields so that no radiation could pass.'

Untethered Spacewalk's 50th Anniversary
'But that space walk of mine wasn't so very amazing.'

ESA Designs Huge Inflatable Moonbase
'It was like being inside a balloon; indeed, that was exactly where he was.'

AlphaGarden Robot Cares For Gardens Better Than Humans
'...a simple clock-set servok with pipe and hose arms.'

Let's Make Slaver Sunflowers! Engineering Plants To Reflect Light
'The mirror-blossom was a terrible weapon.'

TeslaBot Uber Driver (2024) And The Automatic Motorist (1911)
'Robots have worse problems than anybody'

DiffuseBot Uses Generative AI To Invent New Soft Robots
'It embodies several small-scale multiple stampers, apparently for dealing with sheet metal.'

Philips Smart Palm Recognition Smart Deadbolt
'A palm lock must be keyed to one individual's hand shape...'

BMind Smart Mirror from Baracoda
Mirror, mirror, on the wall, who has the greatest wellness of all?

Ballie Your AI Robot Companion From Samsung
Projects your content anywhere you like.

More SF in the News Stories

More Beyond Technovelgy science news stories

Home | Glossary | Invention Timeline | Category | New | Contact Us | FAQ | Advertise |
Technovelgy.com - where science meets fiction™

Copyright© Technovelgy LLC; all rights reserved.