Determination of two-dimensional structures of ultrathin films of H2 and Cu phthalocyanine on MoS2 by angle-resolved ultraviolet photoemission and low energy electron diffraction

K. Kamiya, M. Momose, A. Kitamura, Y. Harada, N. Ueno, S. Hasegawa, T. Miyazaki, H. Inokuchi, S. Narioka, H. Ishii, K. Seki

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14 Citations (Scopus)

Abstract

The angle-resolved ultraviolet photoelectron spectra of ultrathin films of metal-free phthalocyanine (H2Pc) and copper phthalocyanine (CuPc) on MoS2 single crystal surfaces were measured using synchrotron radiation. The take-off and azimuthal angle dependencies of the photoelectron intensity were analyzed using independent-atomic-center approximation combined with molecular orbital calculation. Further, the low energy electron diffraction was observed for the same ultrathin films. The results indicate that H2Pc and CuPc molecules form a square lattice with respect to the three equivalent crystal axes of the MoS2 surface, and at the lattice point lie flat on the substrate with a molecular azimuthal rotation of about 7°.

Original languageEnglish
Pages (from-to)213-218
Number of pages6
JournalJournal of Electron Spectroscopy and Related Phenomena
Volume76
Issue numberC
DOIs
Publication statusPublished - Dec 29 1995
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Spectroscopy
  • Physical and Theoretical Chemistry

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