Prototypical single-molecule transistors with supramolecular gates: Varying dipole orientation

F. Jäckel, Z. Wang, M. D. Watson, K. Müllen, J. P. Rabe

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


Recently, we presented a prototypical three-terminal device, in which the current through a hybrid-molecular diode, whose current voltage characteristic is determined by a single molecule in the junction of a scanning tunneling microscope, is modified by nanometer-sized charge transfer complexes covalently linked to the molecule in the gap [Phys. Rev. Lett. 92 (2004) 188303]. Since the complexes are formed by electron acceptors covalently bound to the molecule in the gap, and electron donors coming from the ambient fluid, this set-up represents a chemical-field-effect transistor based on a single molecule with a nanometer-sized gate. The gating effect was explained by an interface dipole model. Here, we present first tests of this model addressing the orientation of the electrical dipoles. By using amino- and carboxylic acid functionalized molecules in the hybrid-molecular diode we study the effect of dipoles being perpendicular, instead of parallel, to the transistor channel direction and find agreement with the model.

Original languageEnglish
Pages (from-to)269-272
Number of pages4
JournalSynthetic Metals
Issue number3
StatePublished - Nov 3 2004

Bibliographical note

Funding Information:
This work was supported by the Volkswagenstiftung, the European Union (MAC-MES), the German Ministry for Science and Technology and the German Science Foundation.

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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