Molecular alignment and energy-level diagram at heteromolecular interface of quaterrylene and terrylene-3,4,11,12-tetracarboximide

Nobuya Hiroshiba, Jonathan P. Hill, Ryoma Hayakawa, Toyohiro Chikyow, Kiyoto Matsuishi, Katsuhiko Ariga, Yutaka Wakayama*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Heteromolecular layers consisting of quaterrylene (QT) and terrylene-3,4,11,12-tetracarboximide (TTCDI-C 12) were prepared on SiO 2 surfaces and the electronic energy level alignment at TTCDIC12/ QT interface was examined. TTCDI-C 12 layers were grown in nearly perpendicular orientation on QT layers by an ultraslow deposition technique, thereby achieving formation of a well-defined TTCDI-C 12/QT interface. Atomic force microscopy (AFM) measurements ensured excellent surface flatness of each layer, surface roughnesses of which were comparable to that of pristine SiO 2. Energy level alignment at the heteromolecular interface was evaluated by using ultraviolet photoelectron spectroscopy (UPS) and optical absorption measurements. No shift in energy level was observed at the heteromolecular interface, indicating that charge transfer does not occur and a dipole moment is not formed at the well-defined TTCDI-C 12/QT interface.

Original languageEnglish
Pages (from-to)4888-4892
Number of pages5
JournalJournal of Nanoscience and Nanotechnology
Issue number6
Publication statusPublished - 2011 Dec 1
Externally publishedYes


  • Energy level alignment
  • Heteromolecular interface
  • Layer-by-layer growth
  • Ultraslow deposition
  • Ultraviolet photoelectron spectroscopy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Chemistry(all)
  • Materials Science(all)
  • Bioengineering
  • Biomedical Engineering


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