Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Graphene makes movement easy for electrons

Abstract:
Researchers at The University of Manchester have found that electrons move more easily in graphene than all other materials, including gold, silicon, gallium arsenide and carbon nanotubes.

Graphene makes movement easy for electrons

Manchester, UK | Posted on January 8th, 2008

The work has implications for the future development of ultra-high frequency transistors and wiring in electronic circuits - and academics say their findings have singled graphene out as the "best possible" material for electronic applications.

With a high electronic quality - measured at around 200,000 cm2/Vs and more than 100 times higher than for silicon - researchers believe graphene has the potential to improve upon the capabilities of current semiconductors and open up exciting new possibilities. These include ultra-high frequency detectors required for full-body security scanners, which would make people transparent by operating at terahertz (THz) frequencies.

The research is reported in the latest issue of the American Physical Society's journal Physical Review Letters, and has been carried out in conjunction with The Institute for Microelectronics Technology in Russia, The University of Nijmegen in the Netherlands and The Department of Physics at Michigan Technological University in the United States.

"The search is on for materials with higher electronic quality or intrinsic mobility, which should improve the existing applications and open up new ones," said Professor Andre Geim, one of the paper's authors and director of The University of Manchester's Centre for Mesoscience and Nanotechnology.

"Graphene exhibits the highest electronic quality among all known materials - higher than copper, gold, silicon, gallium arsenide, carbon nanotubes, and anything we know. It is the only material where electrons at room temperature can move thousands of interatomic distances without scattering.

"We knew that it could be a long distances and longer than for silicon, but before our latest work we did not know, nor expected, that graphene could beat carbon nanotubes or the record holder Indium antimonide (InSb). Our work singles it out as the best possible material for electronic applications.

"Our findings mean it is worth investing even more effort to develop the material into viable products.

"Neither graphene nor carbon nanotubes can hope to compete with silicon for about another 20 years. The advantage of graphene is that it still holds a lot of promise, which must be investigated.

"The major problems for nanotubes do not exist for graphene. It does have its own problems but they seem doable at least, unlike those for nanotubes, which seemed impossible a few years ago and remain impossible now.

"Whatever comes out as applications, the physics is extremely rich and one can be sure that graphene is here to stay as long as silicon or gallium arsenide, with many more interesting effects to be found. Higher mobility will be a powerful facilitator."

Geim believes graphene-based devices like chemical gas sensors and THz sources and detectors could begin to materialise within three to five years.

Prof Geim added: "Our work puts fundamental limits on what can be potentially done by using graphene. Previously, researchers speculated that the sky was the limit for graphene's electronic quality. Now we know this limit accurately enough. It is not endless but sky-high."
Notes for editors

Prof Andre Geim is available for interview.

A copy of the paper, 'Giant Intrinsic Carrier Mobilities in Graphene and Its Bilayer' is available on request.

####

About University of Manchester
The University of Manchester has an exceptional record of generating and sharing new ideas and innovations.

Many of the advances of the 20th century began at the University, such as the work by Rutherford leading to the splitting of the atom and the developments of the world's first modern computer in 1948.

Today, we are one of the world's top centres for biomedical research, leading the search for new treatments for life-threatening diseases. We are also at the forefront of new discoveries in science and engineering.

For more information, please click here

Contacts:
Alex Waddington
Media Relations Officer
The University of Manchester
44 0161 275 8387

Copyright © University of Manchester

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

Quantum networks: Back and forth are not equal distances! July 28th, 2015

Smart hydrogel coating creates 'stick-slip' control of capillary action July 27th, 2015

Industrial Nanotech, Inc. Provides Update on PCAOB Audited Financials July 27th, 2015

Global Corrosion Resistant Nano Coatings Market To 2015: Acute Market Reports July 27th, 2015

Chip Technology

Quantum networks: Back and forth are not equal distances! July 28th, 2015

Superfast fluorescence sets new speed record: Plasmonic device has speed and efficiency to serve optical computers July 27th, 2015

Spintronics: Molecules stabilizing magnetism: Organic molecules fixing the magnetic orientation of a cobalt surface/ building block for a compact and low-cost storage technology/ publication in Nature Materials July 25th, 2015

Penn researchers discover new chiral property of silicon, with photonic applications July 25th, 2015

Discoveries

Quantum networks: Back and forth are not equal distances! July 28th, 2015

Smaller, faster, cheaper: A new type of modulator for the future of data transmission July 27th, 2015

Researchers predict material with record-setting melting point July 27th, 2015

Reshaping the solar spectrum to turn light to electricity: UC Riverside researchers find a way to use the infrared region of the sun's spectrum to make solar cells more efficient July 27th, 2015

Announcements

Quantum networks: Back and forth are not equal distances! July 28th, 2015

Reshaping the solar spectrum to turn light to electricity: UC Riverside researchers find a way to use the infrared region of the sun's spectrum to make solar cells more efficient July 27th, 2015

Industrial Nanotech, Inc. Provides Update on PCAOB Audited Financials July 27th, 2015

Global Corrosion Resistant Nano Coatings Market To 2015: Acute Market Reports July 27th, 2015

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