Electronic structure and dielectric behavior of finite-length single-walled carbon nanotubes

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

The electronic structure and dielectric screening of finite-length armchair carbon nanotubes are studied within a tight-binding model, which well captures the oscillation pattern of the band gap as the tube length increases. We find that: (1) the parallel screening constant ε || grows almost linearly with the length and shows little dependence on the band gap; (2) the perpendicular screening is strongly related to the band gap and ε converges to its bulk value when the length exceeds tens of radius. Our method is employed to study the depolarization effect of a short (6,6) nanotube in a wet environment, when water is inside the tube. This situation is of interest for biomimctic uses of carbon nanotubes.

Original languageEnglish (US)
Title of host publication2004 4th IEEE Conference on Nanotechnology
Pages273-275
Number of pages3
StatePublished - Dec 1 2004
Event2004 4th IEEE Conference on Nanotechnology - Munich, Germany
Duration: Aug 16 2004Aug 19 2004

Publication series

Name2004 4th IEEE Conference on Nanotechnology

Other

Other2004 4th IEEE Conference on Nanotechnology
CountryGermany
CityMunich
Period8/16/048/19/04

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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    Li, Y., Lu, D., Rotkin, S. V., Schulten, K., & Ravaioli, U. (2004). Electronic structure and dielectric behavior of finite-length single-walled carbon nanotubes. In 2004 4th IEEE Conference on Nanotechnology (pp. 273-275). (2004 4th IEEE Conference on Nanotechnology).