Designer Materials Possible With Designer Electrons

Remarkable new 'designer materials' are being created by Stanford University scientists, working at the Department of Energy's SLAC National Accelerator Laboratory.


(Designer Materials Possible With Designer Electrons)

"The behavior of electrons in materials is at the heart of essentially all of today's technologies," said Hari Manoharan, associate professor of physics at Stanford and a member of SLAC's Stanford Institute for Materials and Energy Science, who led the research. "We're now able to tune the fundamental properties of electrons so they behave in ways rarely seen in ordinary materials."

Their first examples, reported Wednesday in Nature, were handcrafted, honeycomb-shaped structures inspired by graphene, a pure form of carbon that has been widely heralded for its potential in future electronics.

To make the structure, which Manoharan calls molecular graphene, the scientists use a scanning tunneling microscope to place individual carbon monoxide molecules on a perfectly smooth copper surface. The carbon monoxide repels the free-flowing electrons on the copper surface and forces them into a honeycomb pattern, where they behave like graphene electrons.

Precisely positioned carbon monoxide molecules (black) guide electrons (yellow-orange) into a nearly perfect honeycomb pattern called molecular graphene. To tune the electrons' properties, the researchers repositioned the carbon monoxide molecules on the surface; this changed the symmetry of the electron flow. In some configurations, electrons acted as if they had been exposed to a magnetic or electric field. In others, researchers were able to finely tune the density of electrons on the surface by introducing defects or impurities. By writing complex patterns that mimicked changes in carbon-carbon bond lengths and strengths in graphene, the researchers were able to restore the electrons' mass in small, selected areas.

"One of the wildest things we did was to make the electrons think they are in a huge magnetic field when, in fact, no real field had been applied," Manoharan said.

Science fiction fans are excited by this development because it could lead to science fiction materials that previously existed only in novels.

I'm sure readers have their own favorite sfnal materials; here are a few of mine:

  • Fanmetal
    High tensile strength material; used in collapsible structures (from Frank Herbert's 1965 novel Dune).
  • Glassite
    A strong, transparent material (from the 1930 novel Brigands of the Moon by Ray Cummings.
  • Helio-Beryllium
    Unusual alloy combines a metal and a gas (from Robert H. Wilson's 1931 story Out Around Rigel)
  • Steelonium
    Steel that did not rust or corrode (from Hugo Gernsback's 1911 novel Ralph 124c 41 +).
Via Stanford University.

Scroll down for more stories in the same category. (Story submitted 3/21/2012)

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 ")

Self-Healing Material Pulls Carbon Out Of The Air
'... could seal the punctures.' - Raymond Z. Gallun, 1951.

Shapeshifting Materials Transform By Light
'Its lines wavered, flowed, and then painfully reformed.'- Philip K. Dick, 1957.

Superstrong Multilayer Metal-Graphene Composite Material
Negligible increase in weight increased material strength by hundreds of times.

Amphibio 3D Printed Gill Shirt
'... we can descend and live down there at one of those year-round aquatic resorts.' - Philip K. Dick, 1966.

 

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.

 

 

 

 

 

Current News

Spicy Tomatoes Created With Genetic Engineering
How about mashed potatoes and brown gravy?

Driverless Hotel Rooms Predicted In 1828
'Did you never see a moving house before?'

Yandex Self-Driving Taxi Is Very Smooth
'The big car was slowing down, its computer brain sensing an exit ahead.'

Shrimp Actually Made Of Algae Is A New Wave Food
Bring in that crop algae.

Cosplay Style Wings Could Work On Moon
'They're lovely! - titanalloy struts as light and strong as bird-bones...'

Tesla Model 3 Has Outside Speaker Grille
Robert Heinlein does it again.

Arizona Luddites Attack Self-Driving Vehicles
'Trucks don't drive by themselves...' Or do they?

Organaut! Russians 3D Print Living Tissue In Space
'For a while your colonists will have to come up [to orbit] to the Hospital...'

WINE Spacecraft To Extract Water From Asteroids
'Yes, strangely enough there was still sufficient water beneath the surface of Vesta.'

Japanese Swordsmiths Take On Asteroids
'... a tiny, rocket-powered projectile, drove towards the mysterious bulk.'

Saturn's Rings To Vanish, Let's Mine Them While We Can
'...the valuable shards of what had once been satellites.'

Humans Could Take Up A LOT Less Space
We'd have a lot more room for gardening...

Implosion Fabrication Shrinks 3D Objects To Nanoscale
'Carter had watched miniaturization a hundred times...'

GMO Houseplant Cleans Your Air
Removes compounds too small to be captured by a HEPA filter.

Nova Meat Can 3D Print Your Dinner
Printing out chicken nuggets.

MIT Scientists Create 'Peek-a-Boo Prober' From Jetsons
Well, George, it's the latest thing.

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.