Electrical Transport Study of Phenylene-Based π-Conjugated Molecules in a Three-Terminal Geometry

Jeong O. Lee*, Günther Lientschnig, Frank G H Wiertz, Martin Struijk, Réne A J Janssen, Richard Egberink, David N. Reinhoudt, Andrew C. Grimsdale, Klaus Müllen, Peter Hadley, Cees Dekker

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

We fabricated three-terminal devices with conjugated molecules. Two different device layouts were used to measure both very short molecules (with one or two benzene rings) and relatively long ones (as long as 8 nm). To achieve an optimum gate effect, we used aluminum gates covered with a very thin native oxide layer. Molecules with thiol end groups were positioned between the source and drain electrodes by self-assembly. The device yield was low for short molecules, most likely due to defects in the self-assembled monolayers. Most of the devices made with short molecules did not show any gate effect at all; a small gate effect was only observed in two samples made with 1,3-benzenedithiol. Some devices showed clear negative differential conductance peaks. In some devices made with long molecules, we observed a small change of conductance with gate voltage.

Original languageEnglish
Pages (from-to)122-132
Number of pages11
JournalAnnals of the New York Academy of Sciences
Volume1006
DOIs
Publication statusPublished - Dec 2003
Externally publishedYes

Keywords

  • Conjugated molecules
  • Molecular electronics
  • Transistor

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

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