Functional Transistor Is One Atom

Physicists have succeeded in fashioning a working transistor from a single phosphorus atom embedded in a silicon crystal.


(UNSW physicists have created a working transistor
consisting of a single atom placed precisely
in a silicon crystal.)

“Their approach is extremely powerful,” said Andreas Heinrich, a physicist at I.B.M. “This is at least a 10-year effort to make very tiny electrical wires and combine them with the placement of a phosphorus atom exactly where they want them.”

Dr. Heinrich said the research was a significant step toward making a functioning quantum computing system. However, whether quantum computing will ever be harnessed for useful tasks remains uncertain, and the researchers noted that their work demonstrated the fundamental limits that today’s computers would be able to shrink to.

“It shows that Moore’s Law can be scaled toward atomic scales in silicon,” said Gerhard Klimeck, a professor of electrical and computer engineering at Purdue and leader of the project there. Moore’s Law refers to technology improvements by the semiconductor industry that have doubled the number of transistors on a silicon chip roughly every 18 months for the past half-century. That has led to accelerating increases in performance and declining prices. “The technologies for classical computing can survive to the atomic scale,” Dr. Klimeck said.

The scientists placed the single phosphorus atom using a device known as a scanning tunneling microscope. They used it to essentially scrape trenches and a small cavity on a surface of silicon covered with a layer of hydrogen atoms. Phosphine gas was then used to deposit a phosphorus atom at a precise location, which was then encased in further layers of silicon atoms.

The first time I ever heard of this idea was in Robert Heinlein's 1951 novel Between Planets.

"It is theoretically possible to have a matrix in which each individual molecule has a meaning - as they do in the memory cells of your brain. If we had such subtlety, we could wrap your Encyclopedia Britannica into the head of a pin - it would be the head of that pin..."
(Read more about Heinlein's molecule matrix)

Via NYTimes.

Scroll down for more stories in the same category. (Story submitted 2/19/2012)

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 ( 4 )

Related News Stories - (" Computer ")

Finally! Microsoft Surface Neo And Surface Duo Implement Excellent Courier Idea
'Runcible, whose pages were thicker and more densely packed with computational machinery...' - Neal Stephenson, 1995.

Tap Strap 2 Now With Air Mouse
'He waved his hand and the circuit switched abruptly.' - Philip K. Dick, 1955.

Entire Planet Modeled In New MS Flight Sim
'CIC uses [it] to keep track of every bit of spatial information that it owns...' - Neal Stephenson, 1992.

String Art Courtesy Of Robot Artist
The number of different ways to span a thread between a larger number of hooks is astronomical.

 

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

Hail SmartCan! Your Trash Bin Takes Itself Out
'...a waste can twenty feet away stirred into life.'

Finally! Microsoft Surface Neo And Surface Duo Implement Excellent Courier Idea
'Runcible, whose pages were thicker and more densely packed with computational machinery...'

Tap Strap 2 Now With Air Mouse
'He waved his hand and the circuit switched abruptly.'

Legal Profession Now Fairly Bristling With AI
'The virtual counsel appeared to be about forty-five years old and prosperous.'

Entire Planet Modeled In New MS Flight Sim
'CIC uses [it] to keep track of every bit of spatial information that it owns...'

FlyZoo Robot Hotel By Alibaba
'... hotels that specialized in non-human service.'

Implanted Memories Provide Songs To Birds
Finches can't tell the difference.

Robot Tuna Swims As Fast As Nature's Tuna
'With one fluid motion, it surged forward, plunged, and was gone.'

Shapeshifter Robot Is Comprised Of Cobots
'Its lines wavered, flowed, and then painfully reformed. For an interval, the device struggled with itself...'

Google Commits To Fighting Deepfakes
'The program raced up the screen one scan line at a time, subtly smoothing, deleting and coloring.'

China Accused Of Harvesting Organs From Unwanted Groups
'The death penalty was his immortality, and he would vote the death penalty for any crime at all.'

Osmiridium Sounds Like Science Fiction (But It's Not!)
I can't resist science-fictional elements. Especially when they're real.

When Will We See The First Space Hotel?
'The heart of it was a vast hexagonal structure of welded metal, ten miles across...'

SpaceX Starhopper Has Flash Gordon Style
SpaceX makes retro cool spacecraft.

Mindar The Robot Buddhist Priest Offers A Blessing
'Not working is the hardest work of all.'

Does Your Company Need A 'Chief Dreamer'?
As far as the future is concerned 'they're the only experts we have'.

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.