Featured Research

from universities, journals, and other organizations

New technique controls graphite to graphene transition

Date:
June 29, 2012
Source:
University of Arkansas, Fayetteville
Summary:
Physicists have found a way to systematically study and control the transition of graphite, the “lead” found in pencils, to graphene, one of the strongest, lightest and most conductive materials known.

University of Arkansas physicists have found a way to systematically study and control the transition of graphite, the "lead" found in pencils, to graphene, one of the strongest, lightest and most conductive materials known, an important step in the process of learning to use this material in modern day technology.

Peng Xu, Paul Thibado, Yurong Yang, Laurent Bellaiche and their colleagues report their findings in the journal Carbon.

Physicists at the University of Manchester first isolated graphene, a one atom thick sheet of carbon atoms, by using Scotch tape to lift only the top layer off of the other layers of graphite. Electrons moving through graphite have mass and encounter resistance, but electrons moving through graphene are massless and encounter almost no resistance, which makes graphene an excellent candidate material for future energy needs and for quantum computing for enormous calculations while using little energy.

However, graphene is a new material only discovered in 2004, and many things remain unknown about its properties.

"The transition from graphite to graphene can be random," said Xu. "Our idea was to control this."

The researchers used a new technique called electrostatic manipulation scanning tunneling microscopy to "lift" the top layer of graphite, creating graphene. Scientists have traditionally used scanning tunneling microscopy on a stationary surface, but this new technique uses a moving surface to move between graphite and grapheme.

"Not only can we make it happen, but we can control the process," Xu said.

Using this technique, the researchers can tell how much force it takes to create graphene and how much distance exists between graphene and the graphite as well as to track the total energy of the process.

How the electron acquires its mass is a fundamental topic and is related to particle physicists' hunt for the Higgs boson, a long-hypothesized elementary particle that has predicted properties, such as a lack of spin and electric charge, but that does not have a predicted value for mass. Being able to move electrons between a massive and massless state allows scientists to study this duality and how it works. The level of control the scientists have over the process will allow them to figure out possible ways to use graphene for advancing this understanding.

Xu and his colleagues are researchers in the J. William Fulbright College of Arts and Sciences.


Story Source:

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


Journal Reference:

  1. P. Xu, Yurong Yang, S.D. Barber, J.K. Schoelz, D. Qi, M.L. Ackerman, L. Bellaiche, P.M. Thibado. New scanning tunneling microscopy technique enables systematic study of the unique electronic transition from graphite to graphene. Carbon, 2012; DOI: 10.1016/j.carbon.2012.05.050

Cite This Page:

University of Arkansas, Fayetteville. "New technique controls graphite to graphene transition." ScienceDaily. ScienceDaily, 29 June 2012. <www.sciencedaily.com/releases/2012/06/120629211506.htm>.
University of Arkansas, Fayetteville. (2012, June 29). New technique controls graphite to graphene transition. ScienceDaily. Retrieved August 1, 2014 from www.sciencedaily.com/releases/2012/06/120629211506.htm
University of Arkansas, Fayetteville. "New technique controls graphite to graphene transition." ScienceDaily. www.sciencedaily.com/releases/2012/06/120629211506.htm (accessed August 1, 2014).

Share This




More Matter & Energy News

Friday, August 1, 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
7 Ways to Use Toothpaste: Howdini Hacks

7 Ways to Use Toothpaste: Howdini Hacks

Howdini (July 30, 2014) Fresh breath and clean teeth are great, but have you ever thought, "my toothpaste could be doing more". Well, it can! Lots of things! Howdini has 7 new uses for this household staple. Video provided by Howdini
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

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