Featured Research

from universities, journals, and other organizations

Researchers find reliable, mess-free way to grow graphene

Date:
November 17, 2009
Source:
Cornell University
Summary:
Single layers of carbon atoms, called graphene sheets, are lightweight, strong, electrically semi-conducting -- and notoriously difficult and expensive to make. Now, scientists have invented a simple way to make graphene electrical devices by growing the graphene directly onto a silicon wafer.

A conceptual illustration of an array of single atom-thick graphene transistors.
Credit: Shivank Garg

Single layers of carbon atoms, called graphene sheets, are lightweight, strong, electrically semi-conducting -- and notoriously difficult and expensive to make.

Related Articles


Now, a Cornell research team has invented a simple way to make graphene electrical devices by growing the graphene directly onto a silicon wafer. The work was published online Oct. 27 in the journal Nano Letters.

Graphene is often hailed as potentially supplanting silicon in electronics, with its remarkable strength, despite its one atom-thick sheets, and its off-the-charts electrical properties. But making it in large quantities is a challenge, and scientists have turned to methods as crude as using scotch tape to pull off a layer of graphene from graphite, the material found in pencil lead. Such methods would never survive manufacturing, especially since it would produce graphene with varying numbers of layers at random positions.

"You can imagine trying to peel a piece of shrink wrap off a dish to put it on a new dish -- it's going to be messy," said lead researcher Jiwoong Park, Cornell assistant professor of chemistry and chemical biology.

Inspired by previous work in which scientists grew graphene on copper foil, the team grew the graphene directly onto silicon wafers coated with a special evaporated copper film. They then cut the graphene films into their desired shapes using such standard methods as photolithography, and removed the underlying copper with a chemical solution. What was left was a graphene film that draped down over the silicon wafer with little defect.

"Once the graphene is made on top of this wafer, you can apply any thin-film processing technique," Park said.

The team is now experimenting with growing full-scale, four-inch graphene wafers, which would further demonstrate the manufacturing potential of graphene-based electronics.

The paper's first author is Mark P. Levendorf, a graduate student in chemistry, and co-authors are Carlos S. Ruiz-Vargas, a graduate student in applied and engineering physics, and Shivank Garg '10, an undergraduate majoring in chemistry. The work was funded by the Defense Advance Research Projects Agency and the Cornell Center for Materials Research.


Story Source:

The above story is based on materials provided by Cornell University. The original article was written by Anne Ju. Note: Materials may be edited for content and length.


Cite This Page:

Cornell University. "Researchers find reliable, mess-free way to grow graphene." ScienceDaily. ScienceDaily, 17 November 2009. <www.sciencedaily.com/releases/2009/11/091113125445.htm>.
Cornell University. (2009, November 17). Researchers find reliable, mess-free way to grow graphene. ScienceDaily. Retrieved February 28, 2015 from www.sciencedaily.com/releases/2009/11/091113125445.htm
Cornell University. "Researchers find reliable, mess-free way to grow graphene." ScienceDaily. www.sciencedaily.com/releases/2009/11/091113125445.htm (accessed February 28, 2015).

Share This


More From ScienceDaily



More Matter & Energy News

Saturday, February 28, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Elon Musk's Hyperloop Moves Forward

Elon Musk's Hyperloop Moves Forward

Buzz60 (Feb. 27, 2015) Zipping around at 800-miles an hour is coming closer to reality in California. An entire town is being built around Elon Musk&apos;s Hyperloop concept and it wants you to stop in for a ride when it&apos;s ready. Brett Larson is on board. Video provided by Buzz60
Powered by NewsLook.com
Vibrating Bicycle Senses Traffic

Vibrating Bicycle Senses Traffic

Reuters - Innovations Video Online (Feb. 26, 2015) Dutch scientists have developed a smart bicycle that uses sensors, wireless technology and video to warn riders of traffic dangers. Ben Gruber reports. Video provided by Reuters
Powered by NewsLook.com
In Japan, Robot Dogs Are for Life -- And Death

In Japan, Robot Dogs Are for Life -- And Death

AFP (Feb. 25, 2015) Robot dogs are the perfect pet for some in Japan who go to repairmen-turned-vets when their pooch breaks down - while a full Buddhist funeral ceremony awaits those who don&apos;t make it. Duration: 02:40 Video provided by AFP
Powered by NewsLook.com
London Show Dissects History of Forensic Science

London Show Dissects History of Forensic Science

AFP (Feb. 25, 2015) Forensic science, which has fascinated generations with its unravelling of gruesome crime mysteries, is being put under the microscope in an exhibition of real criminal investigations in London. Duration: 00:53 Video provided by AFP
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:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

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