The super-fast electronics of the future will require the use of new materials and the most talked-about moment is graphene . A brief reminder about the material extracted by mechanical exfoliation of graphite ( by pulling tape) : the discovery was made in 2004 at the University of Manchester by the physicist Andre Geim ‘s team . The group had already shown through his research on the diamagnetic which had earned the award in 2000 ” Ig Nobel Prize ” for having made a frog levitate !
Returning to our frogs, graphene is the only known crystal structure with a two-dimensional. The planar structure allows it to have remarkable mechanical and electrical properties . Indeed , in addition to being highly resistant ( Young’s modulus of 0.5 TPa ) , graphene allows electrons to move at a speed estimated in the best case to 100 times higher than in silicon .
In recent years, graphene has become one of the ” darlings ” of laboratories because it is often presented as a replacement for silicon electronics for decades to come. Its characteristics and properties that the consensus among researchers , there is no doubt that without the difficulties of mass production in graphene is already in all our computers!
Each laboratory, each country is in their grain … silica announcing a new method of mass production . What to say in this context? In Sweden , while many laboratories are turning to possible applications that graphene offers is that of the University of Linkoping [ 1] studied a method of production.
The method involves heating a silicon carbide disc around 2000 ° C to evaporate the silicon . ” The secret comes from the uniform distribution of temperature , “explains Michael Syvajarvi , Semiconductor Materials Department , University of Linkoping . It remains difficult to speak of ” mass production ” .
The graphene produced by the method developed at Linkoping University is now used as part of a study at the College of Technology Chalmers [ 2] ( Goteborg) another example of good cooperation between laboratories (housed in schools or universities) in Sweden . Teams Gothenburg does not focus on production, but are intended to demonstrate, characterize and model the properties of a transistor -based operating graphene ( the magnitude being contemplated THz ) .
Below is a nice illustration of graphene suspended :
More information on the websites of two departments:
- University of Linköping: http://www.ifm.liu.se/semicond
- College of Technology Chalmers : https: / / www.chalmers.se/mc2/EN/laboratories/quantum-device-physics
-  http://www.ifm.liu.se/semicond/
-  https: / / www.chalmers.se/mc2/EN/laboratories/quantum-device-physics
- Article: Quantum resistance standards based on epitaxial graphene by A. Tzalenchuk , S. Lara – Avila , A. Kalaboukhov , S. Paolillo , M. Syvajarvi , R. Yakimova , O. Kazakova, T.J.B.M. Janssen , V. Falko and S. Kubatkin . Nature Nanotechnology Advanced Online Publication, January 17 , 2010.
|Category: Material Science||Tags: graphene|