Single-Walled Carbon Nanotube Based Molecular Switch Tunnel Junctions

Michael R. Diehl, David W. Steuerman, Hsian Rong Tseng, Scott A. Vignon, Alexander Star, Paul C. Celestre, J. Fraser Stoddart*, James R. Heath

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

122 Scopus citations

Abstract

This article describes two-termihal molecular switch tunnel junctions (MSTJs) which incorporate a semiconducting, single-walled carbon nanotube (SWNT) as the bottom electrode. The nanotube interacts noncovalently With a monolayer of bistable, nondegenerate [2]catenane tetracations, self-organized by their supporting amphiphilic dimyristoylphosphatidyl anions which shield the mechanically switchable tetracations from a two-micrometer wide metallic top electrobe. The resulting 0.002 μm2 area tunnel junction addresses a nanometer wide row of ≈ 2000 molecules. Active and remnant current-voltage measurements demonstrated that these devices can be reconfigurably switched and repeatedly cycled between high and low current states under ambient conditions. Control compounds, including a degenerate [2]catenane, were explored in support of the mechanical origin of the switching signature. These SWNT-based MSTJs operate like previously reported silicon-based MSTJs, but-differently from similar devices incorporating bottom metal electrodes. The relevance of these results with respect to the choice of electrode materials for molecular electronics devices is discussed.

Original languageEnglish (US)
Pages (from-to)1335-1339
Number of pages5
JournalChemPhysChem
Volume4
Issue number12
DOIs
StatePublished - Dec 15 2003

Keywords

  • Catenanes
  • Molecular electronics
  • Nanotubes
  • Solid-state devices
  • Supramolecular chemistry
  • Tetrathiafulvalene

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry

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