Lattice-oriented growth of single-walled carbon nanotubes

Journal Article (Journal Article)

Single-walled carbon nanotubes (SWNTs) with preferred 2D orientations were synthesized for the first time by chemical vapor deposition (CVD) of methane on silicon surfaces terminated with hydrogen, native oxide, and an ultrathin aluminum layer. The SWNTs grown on Si(100)-based surfaces take two perpendicular directions, and those grown on Si(111)-based surfaces take three preferred directions that are separated by 60°. Simulations of SWNTs on Si(100) and Si(111) surfaces indicate that the observed orientation locking is the result of interactions between nanotubes and the surface lattices. The calculated orientations of energy minimums accord exactly with the experimental results and are independent of the tube chirality as observed. In addition, the calculations also show that the (111) surface is stickier than (100), thus explaining the observation that SWNTs grown on Si(111) surfaces are shorter than those on Si(100) surfaces. © 2000 American Chemical Society.

Full Text

Duke Authors

Cited Authors

  • Su, M; Li, Y; Maynor, B; Buldum, A; Lu, JP; Liu, J

Published Date

  • July 20, 2000

Published In

Volume / Issue

  • 104 / 28

Start / End Page

  • 6507 - 6508

International Standard Serial Number (ISSN)

  • 1520-6106

Digital Object Identifier (DOI)

  • 10.1021/jp0012404

Citation Source

  • Scopus