Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > New Technique Controls Graphite to Graphene Transition

The top three images of graphite are from the experiment and the lower three images were produced through theoretical calculations. The images from left to right show more displacement of the top layer of graphite and its transition to graphene.
The top three images of graphite are from the experiment and the lower three images were produced through theoretical calculations. The images from left to right show more displacement of the top layer of graphite and its transition to graphene.

Abstract:
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.

New Technique Controls Graphite to Graphene Transition

Fayetteville, AR | Posted on July 2nd, 2012

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 graphene.

"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.

####

For more information, please click here

Contacts:
Peng Xu, physics
J. William Fulbright College of Arts and Sciences
479-575-6178


Melissa Blouin
director of science and research communication
University Relations
479-575-3033

Copyright © University of Arkansas, Fayetteville

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

Strange electrons break the crystal symmetry of high-temperature superconductors: Brookhaven Lab scientists discover spontaneous voltage perpendicular to applied current that may help unravel the mystery of high-temperature superconductors July 27th, 2017

Getting closer to porous, light-responsive materials: A new flexible material changes its porous nature when exposed to light July 27th, 2017

First Capacitive Transducer with 13nm Gap July 27th, 2017

Living computers: RNA circuits transform cells into nanodevices July 27th, 2017

Graduate Students from Across the Country Attend Hands-on NanoCamp: Prominent scientists Warren Oliver, Ph.D., and George Pharr, Ph.D., presented a weeklong NanoCamp for hand-picked graduate students across the United States July 26th, 2017

Graphene/ Graphite

Regulation of two-dimensional nanomaterials: New driving force for lithium-ion batteries July 26th, 2017

Scientists produce dialysis membrane made from graphene: Material can filter nanometer-sized molecules at 10 to 100 times the rate of commercial membranes June 29th, 2017

Rice U. chemists create 3-D printed graphene foam June 22nd, 2017

Physics

The first light atomic nucleus with a second face July 20th, 2017

X-ray photoelectron spectroscopy under real ambient pressure conditions June 28th, 2017

Discoveries

Strange electrons break the crystal symmetry of high-temperature superconductors: Brookhaven Lab scientists discover spontaneous voltage perpendicular to applied current that may help unravel the mystery of high-temperature superconductors July 27th, 2017

Getting closer to porous, light-responsive materials: A new flexible material changes its porous nature when exposed to light July 27th, 2017

First Capacitive Transducer with 13nm Gap July 27th, 2017

Living computers: RNA circuits transform cells into nanodevices July 27th, 2017

Announcements

Strange electrons break the crystal symmetry of high-temperature superconductors: Brookhaven Lab scientists discover spontaneous voltage perpendicular to applied current that may help unravel the mystery of high-temperature superconductors July 27th, 2017

Getting closer to porous, light-responsive materials: A new flexible material changes its porous nature when exposed to light July 27th, 2017

First Capacitive Transducer with 13nm Gap July 27th, 2017

Living computers: RNA circuits transform cells into nanodevices July 27th, 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