Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Graphene reveals its magnetic personality

Abstract:
Can organic matter behave like a fridge magnet? Scientists from The University of Manchester have now shown that it can.

In a report published in Nature Physics, they used graphene, the world's thinnest and strongest material, and made it magnetic.

Graphene reveals its magnetic personality

Manchester, UK | Posted on January 8th, 2012

Graphene is a sheet of carbon atoms arranged in a chicken wire structure. In its pristine state, it exhibits no signs of the conventional magnetism usually associated with such materials as iron or nickel.

Demonstrating its remarkable properties won Manchester researchers the Nobel Prize in Physics in 2010.

This latest research led by Dr Irina Grigorieva and Professor Sir Andre Geim (one of the Nobel prize recipients) could prove crucial to the future of graphene in electronics.

The Manchester researchers took nonmagnetic graphene and then either ‘peppered' it with other nonmagnetic atoms like fluorine or removed some carbon atoms from the chicken wire. The empty spaces, called vacancies, and added atoms all turned out to be magnetic, exactly like atoms of, for example, iron.

"It is like minus multiplied by minus gives you plus", says Dr Irina Grigorieva.

The researchers found that, to behave as magnetic atoms, defects must be far away from each other and their concentration should be low. If many defects are added to graphene, they reside too close and cancel each other's magnetism. In the case of vacancies, their high concentration makes graphene disintegrate.

Professor Geim said: "The observed magnetism is tiny, and even the most magnetized graphene samples would not stick to your fridge.

"However, it is important to reach clarity in what is possible for graphene and what is not. The area of magnetism in nonmagnetic materials has previously had many false positives.

"The most likely use of the found phenomenon is in spintronics. Spintronics devices are pervasive, most notably they can be found in computers' hard disks. They function due to coupling of magnetism and electric current.

"Adding this new degree of functionality can prove important for potential applications of graphene in electronics", adds Dr Grigorieva.

Full bibliographic informationNature Physics. Spin-half paramagnetism in graphene induced by point defects, by R. Nair, M. Sepioni, I-Ling Tsai, O. Lehtinen, J. Keinonen, A. Krasheninnikov, T. Thomson, A. Geim and I. Grigorieva, DOI: 10.1038/NPHYS2183

####

For more information, please click here

Contacts:
Suzanne Ross
+44 (0) 161 275 8384


Daniel Cochlin
Media Relations Officer
The University of Manchester
0161 275 8387

Copyright © AlphaGalileo

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

The Hiden EQP Plasma Diagnostic with on-board MCA July 22nd, 2014

Bruker Awarded Fourth PeakForce Tapping Patent: AFM Mode Uniquely Combines Highest Resolution Imaging and Material Property Mapping July 22nd, 2014

NIST shows ultrasonically propelled nanorods spin dizzyingly fast July 22nd, 2014

Penn Study: Understanding Graphene’s Electrical Properties on an Atomic Level July 22nd, 2014

NUS scientists use low cost technique to improve properties and functions of nanomaterials: By 'drawing' micropatterns on nanomaterials using a focused laser beam, scientists could modify properties of nanomaterials for effective applications in photonic and optoelectric applicat July 22nd, 2014

Graphene

Penn Study: Understanding Graphene’s Electrical Properties on an Atomic Level July 22nd, 2014

Haydale and Goodfellow Announce Major Distribution Agreement for Functionalised Graphene Materials July 21st, 2014

CIQUS researchers develop an extremely simple procedure to obtain nanosized graphenes July 15th, 2014

Spintronics

University of Illinois study advances limits for ultrafast nano-devices July 10th, 2014

Harnessing magnetic vortices for making nanoscale antennas: Scientists explore ways to synchronize spins for more powerful nanoscale electronic devices April 30th, 2014

Could Diamonds Be A Computer’s Best Friend? Landmark experiment reveals the precious gem’s potential in computing March 24th, 2014

Spintronic Thermoelectric Power Generators: A step towards energy efficient electronic devices March 21st, 2014

Discoveries

NIST shows ultrasonically propelled nanorods spin dizzyingly fast July 22nd, 2014

Penn Study: Understanding Graphene’s Electrical Properties on an Atomic Level July 22nd, 2014

NUS scientists use low cost technique to improve properties and functions of nanomaterials: By 'drawing' micropatterns on nanomaterials using a focused laser beam, scientists could modify properties of nanomaterials for effective applications in photonic and optoelectric applicat July 22nd, 2014

Oregon chemists eye improved thin films with metal substitution: Solution-based inorganic process could drive more efficient electronics and solar devices July 21st, 2014

Materials/Metamaterials

Penn Study: Understanding Graphene’s Electrical Properties on an Atomic Level July 22nd, 2014

NUS scientists use low cost technique to improve properties and functions of nanomaterials: By 'drawing' micropatterns on nanomaterials using a focused laser beam, scientists could modify properties of nanomaterials for effective applications in photonic and optoelectric applicat July 22nd, 2014

Steam from the sun: New spongelike structure converts solar energy into steam July 21st, 2014

Carbyne morphs when stretched: Rice University calculations show carbon-atom chain would go metal to semiconductor July 21st, 2014

Announcements

Nanometrics Announces Upcoming Investor Events July 22nd, 2014

Bruker Awarded Fourth PeakForce Tapping Patent: AFM Mode Uniquely Combines Highest Resolution Imaging and Material Property Mapping July 22nd, 2014

NIST shows ultrasonically propelled nanorods spin dizzyingly fast July 22nd, 2014

Penn Study: Understanding Graphene’s Electrical Properties on an Atomic Level July 22nd, 2014

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







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE