Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > New Record for World's Smallest Letters: Stanford University breaks record set in 1991, promises denser information storage

Molecular holograms are fashioned with scanning tunneling microscope manipulation. When illuminated by two-dimensional electron gas, a three-dimensional holographic projection is created.

Here, two pages of information, the red and blue letters, are retrieved from a data cube verifying that the quantum nature of electron states has features smaller than anything possible or that can be used to construct elements such as letters directly with atoms. The information density limit of discrete matter identified with atomic manipulation is surpassed by showing that electrons are capable of subatomic encoding.

Credit: Image credit: Hari Manoharan / Stanford University
Molecular holograms are fashioned with scanning tunneling microscope manipulation. When illuminated by two-dimensional electron gas, a three-dimensional holographic projection is created.

Here, two pages of information, the red and blue letters, are retrieved from a data cube verifying that the quantum nature of electron states has features smaller than anything possible or that can be used to construct elements such as letters directly with atoms. The information density limit of discrete matter identified with atomic manipulation is surpassed by showing that electrons are capable of subatomic encoding.

Credit: Image credit: Hari Manoharan / Stanford University

Abstract:
A novel technique that enables researchers to push individual molecules into specifically arranged patterns recently allowed researchers at Stanford University to shatter the long held belief that one bit per atom is the limit for encoding information and reclaim the title of producers of the world's smallest letters.

New Record for World's Smallest Letters: Stanford University breaks record set in 1991, promises denser information storage

Arlington, VA | Posted on March 11th, 2009

Researchers Hari Manoharan and Christopher Moon along with students at Stanford's Physics Department and Geballe Laboratory for Advanced Materials were able to encode 35 bits of information per electron and write letters so small, they are composed of subatomic bits of size 0.3 nanometers, or roughly one third of a billionth of a meter.

The feat edges out researchers at Japanese firm Hitachi, who in 1991 set the record for microscopic calligraphy by chiseling 1.5-nanometre-tall letters into a certain type of crystal.

Stanford's research is supported by the National Science Foundation, the Department of Energy's SLAC National Accelerator Laboratory, the Stanford Institute for Materials and Energy Science, the Office of Naval Research, and the Stanford-IBM Center for Probing the Nanoscale.

Researchers say the small size of letters could enable information to be stored more densely providing greater speed and storage capacity for modern computers. In fact, the letters formed, an "S" and a "U" for Stanford University, are so small they could be used to print the 32-volume Encyclopedia Britannica 2,000 times and the contents would fit on the head of a pin.

To shrink the letters, Manoharan and Moon used a scanning tunneling microscope to arrange individual carbon monoxide molecules on a copper surface in a complicated two-dimensional pattern engineered with a void in the middle into which they desired to project electronic versions of the letters.

They then used the constant flow of electrons naturally present on the copper surface to form the letters. The electrons, rippling over the surface as waves, scattered off any carbon monoxide molecules they met and worked to project holographic patterns of the letters into the void.

The letters were formed in the void by waves of quantum electrons with very small wavelengths. In this way, the two-dimensional pattern of molecules functioned as a molecular-sized hologram, illuminated with electrons instead of light.

"Imagine the copper as a very shallow pool of water into which we put some rocks [the carbon monoxide molecules]," says Manoharan. "The water waves scatter and interfere off the rocks, making well-defined standing wave patterns." If the rocks are positioned just right, the wave patterns will form into letters.

Called "Electronic Quantum Holography," the process was carried out in a vibration proof basement on Stanford's campus.

"In this experiment we've stored some 35 bits per electron to encode each letter," said Manoharan. "We write the letters so small that the bits that comprise them are subatomic in size. So one bit per atom is no longer the limit for information density. There's a grand new horizon below that, in the subatomic regime. Indeed, there's even more room at the bottom than we ever imagined."

A paper on Manoharan's and Moon's work, "Quantum Holographic Encoding in a Two-Dimensional Electron Gas," was published online in Nature Nanotechnology.

####

About National Science Foundation
The National Science Foundation (NSF) is an independent federal agency that supports fundamental research and education across all fields of science and engineering, with an annual budget of $6.06 billion. NSF funds reach all 50 states through grants to over 1,900 universities and institutions. Each year, NSF receives about 45,000 competitive requests for funding, and makes over 11,500 new funding awards. NSF also awards over $400 million in professional and service contracts yearly.

For more information, please click here

Contacts:
Bobbie Mixon
(703) 292-8485

Copyright © National Science Foundation

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Spin current detection in quantum materials unlocks potential for alternative electronics October 15th, 2017

Quantum manipulation power for quantum information processing gets a boost: Improving the efficiency of quantum heat engines involves reducing the number of photons in a cavity, ultimately impacting quantum manipulation power October 14th, 2017

Injecting electrons jolts 2-D structure into new atomic pattern: Berkeley Lab study is first to show potential of energy-efficient next-gen electronic memory October 13th, 2017

The secret to improving liquid crystal's mechanical performance: Better lubricating properties of lamellar liquid crystals could stem from changing the mobility of their structural dislocations by adding nanoparticles October 13th, 2017

Chip Technology

Spin current detection in quantum materials unlocks potential for alternative electronics October 15th, 2017

Quantum manipulation power for quantum information processing gets a boost: Improving the efficiency of quantum heat engines involves reducing the number of photons in a cavity, ultimately impacting quantum manipulation power October 14th, 2017

Injecting electrons jolts 2-D structure into new atomic pattern: Berkeley Lab study is first to show potential of energy-efficient next-gen electronic memory October 13th, 2017

Rice U. lab surprised by ultraflat magnets: Researchers create atom-thick alloys with unanticipated magnetic properties October 13th, 2017

Memory Technology

Injecting electrons jolts 2-D structure into new atomic pattern: Berkeley Lab study is first to show potential of energy-efficient next-gen electronic memory October 13th, 2017

First on-chip nanoscale optical quantum memory developed: Smallest-yet optical quantum memory device is a storage medium for optical quantum networks with the potential to be scaled up for commercial use September 11th, 2017

High-speed quantum memory for photons September 9th, 2017

Fast magnetic writing of data September 7th, 2017

Announcements

Rice U. study: Vibrating nanoparticles interact: Placing nanodisks in groups can change their vibrational frequencies October 16th, 2017

Spin current detection in quantum materials unlocks potential for alternative electronics October 15th, 2017

Quantum manipulation power for quantum information processing gets a boost: Improving the efficiency of quantum heat engines involves reducing the number of photons in a cavity, ultimately impacting quantum manipulation power October 14th, 2017

The secret to improving liquid crystal's mechanical performance: Better lubricating properties of lamellar liquid crystals could stem from changing the mobility of their structural dislocations by adding nanoparticles October 13th, 2017

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project