Featured Research

from universities, journals, and other organizations

New 'Molecular Memory' Only 10 Atoms Thick: Massive Storage Possible

Date:
December 17, 2008
Source:
Rice University
Summary:
Researchers have determined that a strip of graphite only 10 atoms thick can serve as the basic element in a new type of memory, making massive amounts of storage available for computers, handheld media players, cell phones and cameras.

A team at Rice University has determined that a strip of graphite only 10 atoms thick can serve as the basic element in a new type of memory, making massive amounts of storage available for computers, handheld media players, cell phones and cameras.

In new research available online in Nature Materials, Rice professor James Tour and postdoctoral researchers Yubao Li and Alexander Sinitskii describe a solid-state device that takes advantage of the conducting properties of graphene. Tour said such a device would have many advantages over today’s state-of-the-art flash memory and other new technologies.

Graphene memory would increase the amount of storage in a two-dimensional array by a factor of five, he said, as individual bits could be made smaller than 10 nanometers, compared to the 45-nanometer circuitry in today’s flash memory chips. The new switches can be controlled by two terminals instead of three, as in current chips.

Two-terminal capability makes three-dimensional memory practical as graphene arrays can be stacked, multiplying a chip’s capacity with every layer, said Tour, Rice’s Chao Professor of Chemistry as well as a professor of mechanical engineering and materials science and of computer science.

Being essentially a mechanical device, such chips will consume virtually no power while keeping data intact – much the same way today’s e-book readers keep the image of a page visible even when the power is off.

What distinguishes graphene from other next-generation memories is the on-off power ratio – the amount of juice a circuit holds when it’s on, as opposed to off. “It’s huge — a million-to-one,” said Tour. “Phase change memory, the other thing the industry is considering, runs at 10-to-1. That means the ‘off’ state holds, say, one-tenth the amount of electrical current than the ‘on’ state.”

Current tends to leak from an “off” that’s holding a charge. “That means in a 10-by-10 grid, 10 ‘offs’ would leak enough to look like they were ‘on.’ With our method, it would take a million ‘offs’ in a line to look like ‘on,’’’ he said. “So this is big. It allows us to make a much larger array.”

While generating little heat itself, graphene memory seems impervious to a wide temperature range, having been tested from minus 75 to more than 200 degrees Celsius with no discernable effect, Tour said. That allows graphene memory to work in close proximity to hot processors. Better still, tests show it to be impervious to radiation, making it suitable for extreme environments.

Tour said the new switches are faster than his lab’s current testing systems can measure. And they’re robust. “We’ve tested it in the lab 20,000 times with no degradation,” said Tour. “Its lifetime is going to be huge, much better than flash memory.”

Best of all, the raw material is far from exotic. Graphene is a form of carbon. In a clump it’s called graphite, which you spread on paper every time you use a pencil.

The technology has drawn serious interest from industry, said Tour, who’s working on manufacturing techniques. He said it’s possible to deposit a layer of graphene on silicon or another substrate by chemical vapor deposition. “Typically, graphene is very hard to think about fabricating commercially,” he said, “but this can be done very easily by deposition. The same types of processes used right now can be used to grow this type of graphene in place.”


Story Source:

The above story is based on materials provided by Rice University. Note: Materials may be edited for content and length.


Journal Reference:

  1. Yubao Li, Alexander Sinitskii, James M. Tour. Electronic two-terminal bistable graphitic memories. Nature Materials, 2008; DOI: 10.1038/nmat2331

Cite This Page:

Rice University. "New 'Molecular Memory' Only 10 Atoms Thick: Massive Storage Possible." ScienceDaily. ScienceDaily, 17 December 2008. <www.sciencedaily.com/releases/2008/11/081121151719.htm>.
Rice University. (2008, December 17). New 'Molecular Memory' Only 10 Atoms Thick: Massive Storage Possible. ScienceDaily. Retrieved August 22, 2014 from www.sciencedaily.com/releases/2008/11/081121151719.htm
Rice University. "New 'Molecular Memory' Only 10 Atoms Thick: Massive Storage Possible." ScienceDaily. www.sciencedaily.com/releases/2008/11/081121151719.htm (accessed August 22, 2014).

Share This




More Matter & Energy News

Friday, August 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Former TSA X-Ray Scanners Easily Tricked To Miss Weapons

Former TSA X-Ray Scanners Easily Tricked To Miss Weapons

Newsy (Aug. 21, 2014) — Researchers found the scanners could be duped simply by placing a weapon off to the side of the body or encasing it under a plastic shield. Video provided by Newsy
Powered by NewsLook.com
Flower Power! Dandelions Make Car Tires?

Flower Power! Dandelions Make Car Tires?

Reuters - Business Video Online (Aug. 20, 2014) — Forget rolling on rubber, could car drivers soon be traveling on tires made from dandelions? Teams of scientists are racing to breed a type of the yellow flower whose taproot has a milky fluid with tire-grade rubber particles in it. As Joanna Partridge reports, global tire makers are investing millions in research into a new tire source. Video provided by Reuters
Powered by NewsLook.com
Awesome New Camouflage Sheet Was Inspired By Octopus Skin

Awesome New Camouflage Sheet Was Inspired By Octopus Skin

Newsy (Aug. 19, 2014) — Scientists have developed a new device that mimics the way octopuses blend in with their surroundings to hide from dangerous predators. Video provided by Newsy
Powered by NewsLook.com
Researcher Testing on-Field Concussion Scanners

Researcher Testing on-Field Concussion Scanners

AP (Aug. 19, 2014) — Four Texas high school football programs are trying out an experimental system designed to diagnose concussions on the field. The technology is in response to growing concern over head trauma in America's most watched sport. (Aug. 19) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins