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 [1]. 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

- [1] http://www.ifm.liu.se/semicond/
- [2] 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.

Source :

- http://chalmersnyheter.chalmers.se/Article.jsp?article=14690
- http://www.liu.se/news-and-events/?l=en&newsitem=149553
- http://www.nyteknik.se/nyheter/innovation/forskning_utveckling/article48067…