Selective tuning of the electronic properties of coaxial nanocables through exohedral doping

Antonio G. Souza Filho, Vincent Meunier, Mauricio Terrones, Bobby G. Sumpter, Eduardo B. Barros, Federico Villalpando-Páez, Josue Mendes Filho, Yoong Ahm Kim, Hiroyuki Muramatsu, Takuya Hayashi, Morinobu Endo, Mildred S. Dresselhaus

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

The electronic properties of exohedrally doped double-walled carbon nanotubes (DWNTs) have been investigated using density functional theory and resonance Raman spectroscopy (RRS) measurements. First-principles calculations elucidate the effects of exohedral doping on the M@S and S@M systems, where a metallic (M) tube is either inside or outside a semiconducting (S) one. The results demonstrate that metallic nanotubes are extremely sensitive to doping even when they are inner tubes, in sharp contrast to semiconducting nanotubes, which are not affected by doping when the outer shell is a metallic nanotube (screening effects). The theoretical predictions are in agreement with RRS data on Br2- and H2SO4-doped DWNTs. These results pave the way to novel nanoscale electronics via exohedral doping.

Original languageEnglish (US)
Pages (from-to)2383-2388
Number of pages6
JournalNano letters
Volume7
Issue number8
DOIs
StatePublished - Aug 2007

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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