Defect-controlled transport properties of metallic atoms along carbon nanotube surfaces

Barinov A., Uestuenel H., Fabris S., Gregoratti L., Aballe L., Dudin P., ...More

PHYSICAL REVIEW LETTERS, vol.99, no.4, 2007 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 99 Issue: 4
  • Publication Date: 2007
  • Doi Number: 10.1103/physrevlett.99.046803
  • Journal Name: PHYSICAL REVIEW LETTERS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Middle East Technical University Affiliated: Yes

Abstract

The diffusion mechanism of indium atoms along multiwalled carbon nanotubes is studied by means of photoemission spectromicroscopy and density functional theory calculations. The unusually high activation temperature for diffusion (approximate to 700 K), the complex C 1s and In 3d(5/2) spectra, and the calculated adsorption energies and diffusion barriers suggest that the indium transport is controlled by the concentration of defects in the C network and proceeds via hopping of indium adatoms between C vacancies.