Jean-Christophe Lavocat

6 posts · 3,176 views

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  • January 31, 2014
  • 02:56 AM
  • 522 views

Des batteries à base de végétaux

by Jean-Christophe Lavocat in Presstor

L'écosystème du stockage d'énergie se dirige de plus en plus vers des solutions alternatives inspirées par la Nature.... Read more »

Huskinson B, Marshak MP, Suh C, Er S, Gerhardt MR, Galvin CJ, Chen X, Aspuru-Guzik A, Gordon RG, & Aziz MJ. (2014) A metal-free organic-inorganic aqueous flow battery. Nature, 505(7482), 195-8. PMID: 24402280  

  • March 25, 2013
  • 11:35 AM
  • 563 views

Des écrans 3D transparents et mobiles développés par HP

by Jean-Christophe Lavocat in Presstor

HP a mis au point un écran 3D pour les appareils mobiles qui ne nécessite pas de lunettes et vient d'être révélé dans la revue scientifique Nature. Cet écran utilise les nanotechnologies pour émettre la lumière de manière homogène selon différents angles de projection. L'effet 3D est visible même si l'on regarde la surface à 45 degrés.... Read more »

Fattal, D., Peng, Z., Tran, T., Vo, S., Fiorentino, M., Brug, J., & Beausoleil, R. (2013) A multi-directional backlight for a wide-angle, glasses-free three-dimensional display. Nature, 495(7441), 348-351. DOI: 10.1038/nature11972  

  • March 16, 2013
  • 03:22 PM
  • 450 views

De nouveaux matériaux magnéto-électriques promettent des progrès dans l'informatique

by Jean-Christophe Lavocat in Presstor

Des physiciens ont mis au point de nouvelles méthodes de contrôle de l'ordre magnétique dans une classe particulière de matériaux dit "magnéto-électriques." Les magnéto-électriques tirent leur nom du fait que leurs propriétés magnétiques et électriques sont couplées les unes aux autres. Ce lien physique permet potentiellement le contrôle de leur comportement magnétique d&#........ Read more »

Ryan, P., Kim, J., Birol, T., Thompson, P., Lee, J., Ke, X., Normile, P., Karapetrova, E., Schiffer, P., Brown, S.... (2013) Reversible control of magnetic interactions by electric field in a single-phase material. Nature Communications, 1334. DOI: 10.1038/ncomms2329  

  • February 16, 2013
  • 12:00 PM
  • 425 views

What kind of graphene for which application ?

by Jean-Christophe Lavocat in Graphenea ~ News about Graphene

The development of graphene has a very high pace. The production of graphene is made in different ways, for instance by chemical vapor deposition or by growth on Si, and the applications and quality vary a lot. In this blog post we will try to help you deciding which kind of graphene is good for a given application. We will also introduce you to the ratio price/quality that has a real importance for mass scale production.
... Read more »

Novoselov KS, Fal'ko VI, Colombo L, Gellert PR, Schwab MG, & Kim K. (2012) A roadmap for graphene. Nature, 490(7419), 192-200. PMID: 23060189  

  • December 14, 2012
  • 04:07 AM
  • 679 views

Nasa is developping graphene based sensors

by Jean-Christophe Lavocat in Graphenea ~ News about Graphene

The famous US aerospace and aeronautics agency NASA is currently developing sensors based on graphene. The main leader of the initiative, Mahmooda Sultana, joined NASA's Goddard Space Flight Center in Greenbelt two years ago. She had since then won research and development fundings to install graphene production facilities.... Read more »

Li, Mary; Sultana, Mahmooda; Hess, Larry. (2012) Graphene Transparent Conductive Electrodes for Next- Generation Microshutter Arrays . NASA Tech Briefs, May 2012. info:other/20120009225

  • December 6, 2012
  • 05:00 PM
  • 537 views

A bandgap semiconductor nanostructure made entirely from graphene

by Jean-Christophe Lavocat in Graphenea ~ News about Graphene

In 2005, when Andre Geim and Philip Kim separately worked on graphene's electrons and showed that the material was showing a zero-bandgap, this came as a very curious feature that people would probably use. This zero-bandgap property makes that graphene is not a real semi-conductor and could not be used directly by the industry. Many successful attempts were made to create a band gap in graphene, by using doped graphene, nanoribbons or by using an electric field between a bi-layered graphen........ Read more »

Hicks, J., Tejeda, A., Taleb-Ibrahimi, A., Nevius, M., Wang, F., Shepperd, K., Palmer, J., Bertran, F., Le Fèvre, P., Kunc, J.... (2012) A wide-bandgap metal–semiconductor–metal nanostructure made entirely from graphene. Nature Physics. DOI: 10.1038/nphys2487  

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