Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Breakthrough for the super material graphene

Abstract:
The hyper-quick electronics of the future will require new materials and the hottest around is graphene - a single layer of carbon atoms. Graphene produced using a method developed at Linköping University is now being used as part of a study at Chalmers University of Technology, where it has been shown that graphene maintains the same high quality as silicon, thus paving the way for large-scale production.

Breakthrough for the super material graphene

Sweden | Posted on January 26th, 2010

These promising results have been published in an online edition of the journal Nature Nanotechnology. The research group at Linköping University of Technology, led by Professor Rositza Yakimova, together with a research group at Chalmers, led by Associate Professor Sergey Kubatkin at the Department of Microtechnology and Nanoscience, MC2, along with colleagues in the United Kingdom and Italy, has demonstrated that Swedish graphene offers a high degree of accuracy for quantum mechanical effects - something that is otherwise only achieved in well-established semiconductors such as silicon and gallium arsenide.

The speed of the electrons in silicon - which is currently used to manufacture processors - has reached its limit. In graphene the electrons are 100 times quicker than in silicon and research groups throughout the world are now attempting to produce the material with sufficiently high quality.

Previously it has only been possible to demonstrate promising features on small areas of graphene. In order to progress it must be possible to manufacture the material with a larger area in order to make wafers from which circuits can be constructed. The focus of the research is now on wafers of silicon carbide, where the silicon is removed from the surface leaving a layer of carbon atoms. The advantage is that sufficiently large wafers of silicon carbide are commercially available although ensuring that the graphene is evenly shaped and with sufficient quality over large areas has proved difficult.

"The measurements indicate an improvement of four orders of magnitude or 10,000 times greater accuracy than the best results that have been achieved using exfoliated graphene," says Sergey Kubatkin, Associate Professor at Chalmers University of Technology. The results provide the first resistance standard, i.e. a measure of electronic resistance that is dependent purely on natural constants and which functions at a temperature of 4.2 K. The two resistance standards that have existed up to now are based on silicon or gallium arsenide but only work at very low temperatures and are considerably more difficult to produce and use.

The material that has now been tested successfully is manufactured using a method developed by the Linköping team Rositza Yakimova, Mikael Syväjärvi and Tihomir Iakimov.

"This indicates that Swedish research is world class when it comes to producing new materials that offer sufficiently high performance for use in the electronics of the future," says Mikael Syväjärvi, Associate Professor at the Department of Physics, Chemistry and Biology.

Article: Quantum resistance standard based on epitaxial graphene by A. Tzalenchuk, S. Lara-Avila, A. Kalaboukhov, S. Paolillo, M. Syväjärvi, R. Yakimova, O. Kazakova, T.J.B.M. Janssen, V. Falko and S. Kubatkin. Nature Nanotechnology Advanced Online Publication, January 17, 2010.

####

About Chalmers University of Technology
Chalmers is a Swedish university of technology in which research and teaching are conducted on a broad front within technology, natural science and architecture. Our inspiration lies in the joy of discovery and the desire to learn. Underlying everything we do is a wish to contribute to sustainable development both in Sweden and world-wide.

For more information, please click here

Contacts:
Sergey Kubatkin
associate professor
+46(0)31-772 5475


Mikael Fogelström
professor
+46(0)31-772 3196


Rositza Yakimova
professor
+46(0)13-282528


Mikael Syväjärvi
associate professor
+46(0)13-285708

Copyright © Chalmers University of Technology

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

Iranian Researchers Present New Model to Strengthen Superconductivity at Higher Temperatures April 19th, 2014

Iranian Researchers Produce New Anti-Cancer Drug from Turmeric April 19th, 2014

'Exotic' material is like a switch when super thin April 18th, 2014

Innovative strategy to facilitate organ repair April 18th, 2014

Chip Technology

'Exotic' material is like a switch when super thin April 18th, 2014

Scientists open door to better solar cells, superconductors and hard-drives: Research enhances understanding of materials interfaces April 14th, 2014

Obducat has launched a new generation of SINDRE® Nano Imprint production system April 11th, 2014

Scientists in Singapore develop novel ultra-fast electrical circuits using light-generated tunneling currents April 10th, 2014

Nanoelectronics

Better solar cells, better LED light and vast optical possibilities April 12th, 2014

Catching the (Invisible) Wave: UC Santa Barbara researchers create a unique semiconductor that manipulates light in the invisible infrared/terahertz range, paving the way for new and enhanced applications April 11th, 2014

Nanotech Business Review 2013-2014 April 9th, 2014

Preview of Hands-on Nanotechnology Demos at ‘Chemistry of Wine’ Fundraiser to Show Nanotech Magic April 8th, 2014

Discoveries

Iranian Researchers Present New Model to Strengthen Superconductivity at Higher Temperatures April 19th, 2014

Iranian Researchers Produce New Anti-Cancer Drug from Turmeric April 19th, 2014

'Exotic' material is like a switch when super thin April 18th, 2014

Innovative strategy to facilitate organ repair April 18th, 2014

Materials/Metamaterials

Thinnest feasible membrane produced April 17th, 2014

INSCX™ exchange to present Exchange trade reporting mechanism for engineered nanomaterials (NMs) to UK regulation agencies, insurers and upstream/downstream users April 17th, 2014

Engineers develop new materials for hydrogen storage April 15th, 2014

Industrial Nanotech, Inc. Lands First Major Order from Pemex, Mexico’s State-Owned Oil and Gas Company April 14th, 2014

Announcements

Iranian Researchers Present New Model to Strengthen Superconductivity at Higher Temperatures April 19th, 2014

Iranian Researchers Produce New Anti-Cancer Drug from Turmeric April 19th, 2014

'Exotic' material is like a switch when super thin April 18th, 2014

Innovative strategy to facilitate organ repair April 18th, 2014

Quantum nanoscience

Quantum manipulation: Filling the gap between quantum and classical world April 14th, 2014

Scientists in Singapore develop novel ultra-fast electrical circuits using light-generated tunneling currents April 10th, 2014

Quantum Photon Properties Revealed in Another Particle—the Plasmon April 5th, 2014

Notre Dame researchers provide new insights into quantum dynamics and quantum chaos April 2nd, 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