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 July 31, 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 July 31, 2014).

Share This




More Matter & Energy News

Thursday, July 31, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Britain Testing Driverless Cars on Roadways

Britain Testing Driverless Cars on Roadways

AP (July 30, 2014) — British officials said on Wednesday that driverless cars will be tested on roads in as many as three cities in a trial program set to begin in January. Officials said the tests will last up to three years. (July 30) Video provided by AP
Powered by NewsLook.com
Amid Drought, UCLA Sees Only Water

Amid Drought, UCLA Sees Only Water

AP (July 30, 2014) — A ruptured 93-year-old water main left the UCLA campus awash in 8 million gallons of water in the middle of California's worst drought in decades. (July 30) Video provided by AP
Powered by NewsLook.com
Smartphone Powered Paper Plane Debuts at Airshow

Smartphone Powered Paper Plane Debuts at Airshow

AP (July 30, 2014) — Smartphone powered paper airplane that was popular on crowdfunding website KickStarter makes its debut at Wisconsin airshow (July 30) Video provided by AP
Powered by NewsLook.com
U.K. To Allow Driverless Cars On Public Roads

U.K. To Allow Driverless Cars On Public Roads

Newsy (July 30, 2014) — Driverless cars could soon become a staple on U.K. city streets, as they're set to be introduced to a few cities in 2015. Video provided by Newsy
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