Nanotech 2002 Vol. 2
Nanotech 2002 Vol. 2
Technical Proceedings of the 2002 International Conference on Computational Nanoscience and Nanotechnology

Molecular and Nanoelectronics Chapter 12

Field Emission of Carbon Nanotubes and the Electronic Structure of Fullerenes Encapsulated in Carbon Nanotubes

Authors: Y. Cho, G. Kim, S. Lee and J. Ihm

Affilation: Seoul National University, Korea

Pages: 291 - 294

Keywords: field emission, carbon nanotube, carbon nanopeapod

We have performed first-principles calculations on the field emission of carbon nanotubes. The three-dimensional character of the current source, as well as the effect of the external electric field, are explicitly considered. The calculated electron-leakage by solving the time-dependent Schrödinger equation is quite linear in short time scale, giving the tunneling rate from the emitter to the vacuum. The total current fits the Fowler-Nordheim formula reasonably well. The magnitude of the current associated with each electronic state is found to exponentially depend on the energy level. We have also performed first-principles pseudopotential calculations for the electronic structure of fullerenes such asC82 encapsulated in single-walled carbon nanotubes. We find a charge transfer occurs between the carbon nanotube (CNT) and C82, and states are produced by the hybridizaion of C82 and the CNT.

ISBN: 0-9708275-6-3
Pages: 504