Navigation Links
Graphene gazing gives glimpse of foundations of universe
Date:4/4/2008

Researchers at The University of Manchester have used graphene to measure an important and mysterious fundamental constant - and glimpse the foundations of the universe.

The researchers from The School of Physics and Astronomy, led by Professor Andre Geim, have found that the worlds thinnest material absorbs a well-defined fraction of visible light, which allows the direct determination of the fine structure constant.

Working with Portuguese theorists from The University of Minho in Portugal, Geim and colleagues report their findings online in the latest edition of Science Express. The paper will be published in the journal Science in the coming weeks.

The universe and life on this planet are intimately controlled by several exact numbers; so-called fundamental or universal constants such as the speed of light and the electric charge of an electron.

Among them, the fine structure constant is arguably most mysterious. It defines the interaction between very fast moving electrical charges and light or electromagnetic waves and its exact value is close to 1/137.

Prof Geim, who in 2004 discovered graphene with Dr Kostya Novoselov, a one-atom-thick gauze of carbon atoms resembling chicken wire, says: Change this fine tuned number by only a few percent and the life would not be here because nuclear reactions in which carbon is generated from lighter elements in burning stars would be forbidden. No carbon means no life.

Geim now working together with PhD students Rahul Nair and Peter Blake have for the first time produced large suspended membranes of graphene so that one can easily see light passing through this thinnest of all materials.

The researchers have found the carbon monolayer is not crystal-clear but notably opaque, absorbing a rather large 2.3 percent of visible light. The experiments supported by theory show this number divided by Pi gives you the exact value of the fine structures constant.

The fundamental reason for this is that electrons in graphene behave as if they have completely lost their mass, as shown in the previous work of the Manchester group and repeated by many researchers worldwide.

The accuracy of the optical determination of the constant so far is relatively low, by metrological standards.

But researchers say the simplicity of the Manchester experiment is truly amazing as measurements of fundamental constants normally require sophisticated facilities and special conditions.

With large membranes in hand, Prof Geim says it requires barely anything more sophisticated then a camera to measure visual transparency of graphene.

We were absolutely flabbergasted when realized that such a fundamental effect could be measured in such a simple way. One can have a glimpse of the very foundations of our universe just looking through graphene, said Prof Geim.

Graphene continues to surprise beyond the wildest imagination of the early days when we found this material.

It works like a magic wand whatever property or phenomenon you address with graphene, it brings you back a sheer magic.

I was rather pessimistic about graphene-based technologies coming out of research labs any time soon. I have to admit I was wrong. They are coming sooner rather than later.


'/>"/>

Contact: Alex Waddington
alex.waddington@manchester.ac.uk
University of Manchester
Source:Eurekalert

Related biology technology :

1. UM physicists show electrons can travel over 100 times faster in graphene than in silicon
2. Biopure Gives Update on Malaysia Joint Venture Discussions
3. Laser Therapy Gives Smokers Hope for Successful New Years Resolution
4. Montana State University lab gives early warnings about biological invaders
5. European Commission gives grant to investigate transatlantic oversight of nanotech
6. Share Issue Gives Cellectricon SEK 89 Million to Continue its Rapid Market Expansion
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/2/2016)... The immunohistochemistry (IHC) market is projected to reach ... during the forecast period of 2016 to 2021 dominated by immunohistochemistry ... the largest share of immunohistochemistry (IHC) market, by end user.   ... , , ... across 225 pages, profiling 10 companies and supported with 181 tables ...
(Date:11/30/2016)... ... November 30, 2016 , ... BEI Kimco, a ... with a flexure design that ensures high alignment accuracy by preventing unwanted shaft ... ideally suited where extreme precision is required, such as in medical equipment, laboratory ...
(Date:11/30/2016)... ALBANY, New York , November 30, 2016 /PRNewswire/ ... exceptionally consolidated as a few players hold a dominant ... Lonza Group, Charles River Laboratories International, Inc., and Merck ... global market in 2015. Transparency Market Research observes that ... they are focused on development products that are do ...
(Date:11/30/2016)... RATON, Fla. , Nov. 30, 2016 ... biotherapeutic products, is pleased to announce the addition of ... Avenue Kearney, Nebraska . The 15,200 ... business on November 29th, 2016 and brings the total ... Ileana Carlisle , BPC,s Chief Executive ...
Breaking Biology Technology:
(Date:6/9/2016)... June 9, 2016  Perkotek an innovation leader in attendance control systems is proud ... work hours, for employers to make sure the right employees are actually signing in, ... ... ... ...
(Date:6/2/2016)... 2, 2016 The Department of Transport ... the 44 million US Dollar project, for the , ... including Personalization, Enrolment, and IT Infrastructure , to ... production and implementation of Identity Management Solutions. Numerous renowned international ... Decatur was selected for the most compliant ...
(Date:5/24/2016)... superior patient care by providing unparalleled technology to leaders of the medical imaging industry. ... recently added to the range of products distributed by Ampronix. Photo - ... ... ... ...
Breaking Biology News(10 mins):