Nanophase segregation and rectification in monolayers of functionalized hexa-peri-hexabenzocoronenes

F. Jäckel, X. Yin, P. Samorì, N. Tchebotareva, M. D. Watson, A. Venturini, K. Müllen, J. P. Rabe

Research output: Contribution to journalConference articlepeer-review

5 Scopus citations


We report a scanning tunneling microscopy (STM) and scanning tunneling spectroscopy (STS) study on the structural and electronic transport properties of self-assembled monolayers of functionalized hexa-peri-hexabenzocoronenes (HBCs) at the graphite-solution interface. The HBCs bearing either one pyrene (PY) or six anthraquinone (AQ) substituents form two-dimensional crystalline arrays where the HBC and the additional moieties are phase segregated on the nanoscale. Differences in contrast between the HBCs and their substituants can be correlated with the results of quantum chemical calculations on the frontier orbitals of the different moieties. The variation of the tunneling parameters in the STM provides further insight into the markedly different electronic properties of the HBC and the AQ moieties at the interface. Furthermore, STS investigations revealed an inverse rectifying behavior of the two different moieties within the tunneling junction, which can be explained with resonantly enhanced tunneling through the HOMO of the HBC and the LUMO of the AQ. This study opens new possibilities for the research towards mono-molecular electronics.

Original languageEnglish
Pages (from-to)5-9
Number of pages5
JournalSynthetic Metals
Issue number1-3
StatePublished - Dec 7 2004
EventSupramolecular Approaches to Organic Electronics and Nanotechn. - Strasbourg, France
Duration: May 24 2004May 28 2004

Bibliographical note

Funding Information:
This work was supported by the EU through DISCEL and MAC-MES, the ESF through SMARTON and SONS-BIONICS, and the German BMBF (03N 6500).


  • Molecular electronics
  • Self-assembly

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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