Fabrication of Coulomb blockade device utilizing the 0.34 nm interlayer spacing in a multiwalled carbon nanotube

E. Watanabe, K. Tsukagoshi, I. Yagi, Y. Aoyagi

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)

Abstract

The mechanism for electrical conduction between the layers of a multiwalled carbon nanotube (MWNT) is investigated. Enhancement of the longitudinal conductance of MWNTs is observed with increasing bias voltage. The effect is explained by a model, in which interlayer radial gaps (0.34 nm) are assumed to act as tunnel barriers. Based on this concept, we propose and demonstrate a novel nanosized tunnel device in a MWNT. Coulomb blockade oscillations with a charging energy of 15 meV are observed at 4.2 K, indicating that there is a tunneling barrier at the fine 0.34 nm interlayer spacing that is useful for tunnel junction device formation.

Original languageEnglish
Pages (from-to)666-669
Number of pages4
JournalMicroelectronic Engineering
Volume73-74
DOIs
Publication statusPublished - 2004 Jun
Externally publishedYes
EventMicro and Nano Engineering 2003 - Cambridge, United Kingdom
Duration: 2003 Sep 222003 Sep 25

Keywords

  • Coulomb blockade effect
  • Interlayer
  • Multiwalled carbon nanotube
  • Tunneling

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Electrical and Electronic Engineering

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