Screening of water dipoles inside finite-length armchair carbon nanotubes

Yan Li, Deyu Lu, Klaus Schulten, Umberto Ravaioli, Slava V. Rotkin

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


The electronic structure and dielectric screening of finite-length armchair carbon nanotubes are studied with both tight-binding and ab initio methods. Good agreement is found in the band gap oscillation patterns and dielectric constants, which validates the tight-binding method as a reliable and fast approach to describe the screening effect of carbon nanotubes. For an illustration, our method is applied to a system consisting of a short (6,6) nanotube filled with six water molecules. Substantial screening of the water dipoles through the nanotube is observed. This polarization effect should have an important influence on the permeation of water and other biomolecules inside carbon nanotubes.

Original languageEnglish (US)
Pages (from-to)161-165
Number of pages5
JournalJournal of Computational Electronics
Issue number1-2
StatePublished - Apr 2005

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Modeling and Simulation
  • Electrical and Electronic Engineering


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