Exploring the carbon nanocosmos: Doped nanotubes, networks, and other novel forms of carbon

M. Terrones, P. M. Ajayan, F. Banhart, X. Blase, D. L. Carroll, J. C. Charlier, R. Czerw, N. Grobert, R. Kamalakaran, M. Mayne, M. Reyes-Reyes, M. Rühle, T. Seeger, H. Terrones

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations

Abstract

High temperature routes to arrays of aligned CNx nanotubes and B-doped carbon nanotubes are presented. The materials have been characterized using state-of-the-art techniques such as high-resolution electron energy loss spectroscopy (HREELS), scanning tunneling spectroscopy (STS) and high-resolution transmission electron microscopy (HRTEM). Using STS, we show that the doped nanotubes exhibit strong features on the conduction (for CNx nanotubes) and valence band (for B-doped nanotubes) close to the Fermi level, thus indicating that electron-rich (CNx) and hole-rich (B-doped) nanotubes are indeed fabricated (n- and p-type respectively). Tight-binding and ab-inito calculations confirm our experimental results obtained using STS. Finally, it is demonstrated that high electron irradiation at 700 - 800°C, is capable of creating "X" and "Y" junctions using single-walled nanotubes (SWNTs). The process has also been studied using tight-binding molecular dynamics (TBMD). Vacancies trigger the organization of atoms on the tube lattices within adjacent tubes. These results pave the way to the fabrication of nanotube heterojunction networks, robust composites, contacts, nanocircuits and strong 3D composites.

Original languageEnglish (US)
Pages (from-to)1-13
Number of pages13
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5118
DOIs
StatePublished - 2003
EventNonatechnology - Maspalomas, Gran Canaria, Spain
Duration: May 19 2003May 21 2003

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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