Walter de Heer

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Walt de Heer 1997

Walter Alexander "Walt" de Heer (born November 1949 ) is an American physicist who deals with solid-state physics, nanotechnology and especially graphene .

De Heer received his PhD in physics from the University of California, Berkeley , under Walter D. Knight in 1984 . After that he was at the École polytechnique fédérale de Lausanne until 1997 . He is Regents Professor at the Georgia Institute of Technology .

While still a student, he researched metal clusters and was involved in research that showed the shell structure of their electronic excitations, i.e. properties similar to atoms. Then he researched their magnetic properties. From the mid-1990s onwards, he began working on carbon nanotubes, whose good field emission properties he demonstrated with possible applications on flat screens. In 1998 he demonstrated the ballistic (resistance-free) transport of electrons in carbon nanotubes at room temperature. Research into carbon nanotubes led him from 2001 to investigate the possibility of monatomic two-dimensional carbon layers (graphs). A 2004 publication by his group (Journal of Physical Chemistry) also outlined its application in electronics (transistors). This was also the subject of a priority dispute (letter from de Heer to the Nobel Committee about their explanations on the Nobel Prize for Andre Geim and Konstantin Novoselov 2010), since he claimed to have published Geim and Novoselov about electronic measurements on graphs in 2006 with Claire Berger and Phillip First the first US patent on graphene electronics.

In 2008 he was listed among the 10 Breakthrough Technologies of the Technology Review for graphene electronics. In 2006 he came under the Scientific American 50. In 2010 he received the Material Research Society Medal. He is one of the most highly cited scientists.

Fonts (selection)

  • with WD Knight u. a .: Electronic shell structure and abundances of sodium clusters, Phys. Rev. Lett., Vol. 52, 1985, p. 2141
  • The physics of simple metal clusters: experimental aspects and simple models, Reviews of Modern Physics, Volume 65, 1993, p. 61
  • with I. Billas, Andre Chatelain: Magnetism from the Atom to the Bulk in Iron, Cobalt, and Nickel Clusters, Science, Volume 265, 1994, pp. 1682-1684
  • with A. Chatelain, D. Ugarte: A Carbon Nanotube Field-Emission Electron Source, Science, Volume 270, 1995, p. 1179.
  • with S. Frank, P. Poncharal, ZL Wang: Carbon Nanotube Quantum Resistors, Science, Volume 280, 1998, pp. 1744-1746.
  • with P. Poncharal u. a .: Electrostatic deflections and electromechanical resonances of carbon nanotubes, Science, Volume 283, 1999, pp. 1513-1516
  • with RH Baughman, AA Zakhidov: Carbon nanotubes - the route toward applications, Science, Volume 297, 2002, pp. 787-792
  • with Claire Berger, Phillip First u. a .: Ultrathin Epitaxial Graphite: 2D Electron Gas Properties and a Route toward Graphene-based Nanoelectronics, J. of Phys. Chem. B, Vol. 108, 2004, pp. 19912-19916, Arxiv
  • with C. Berger, Z. Song, Phillip First a. a .: Electronic confinement and coherence in patterned epitaxial graphene, Science, Volume 312, 2006, pp. 1191-1196
  • with S. Uhou u. a .: Substrate-induced band gap opening in epitaxial graphene, Nature Materials, Volume 6, 2007, p. 770
  • with C. Berger, P. First u. a .: Epitaxial graphene, Solid State Communications, Volume 143, 2007, pp. 92-100
  • with J. Hass, EH Conrad: The growth and morphology of epitaxial multilayer graphene, Journal of Physics: Condensed Matter, Volume 20, 2008, p. 323202

For further work see the list of publications by Claire Berger .

Web links

Individual evidence

  1. ↑ Information on his website at the Georgia Institute of Technology.
  2. ^ Nobel document triggers debate , Nature, Volume 468, 2010, p. 486
  3. ↑ Geims and Novoselov's Science paper from 2004 (Electric field effect in atomically thin carbon films, Science, Volume 306, p. 666) does not deal with measurements on monatomic layers, in contrast to (as later became clear) the paper by de Heer and Colleagues from 2004. Geim only reported such measurements in 2005 (Proc. Natl Acad. Sci. USA, Volume 102, 2005, pp. 10451-10453).
  4. ↑ Patterned thin film graphite devices and method for making same , US Patent 7015142, Espace.net (European Patent Office)
  5. ↑ Kevin Bullis, TR10: Graphene Transistors , Technology Review 2008
  6. ^ Scientific American 50 , 2006
personal data
SURNAME Army, Walter de
ALTERNATIVE NAMES Army, Walt de
BRIEF DESCRIPTION American physicist
DATE OF BIRTH November 1949