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 language | English |
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Pages (from-to) | 213-218 |
Number of pages | 6 |
Journal | Journal of Electron Spectroscopy and Related Phenomena |
Volume | 76 |
Issue number | C |
DOIs | |
Publication status | Published - Dec 29 1995 |
Externally published | Yes |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Radiation
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Spectroscopy
- Physical and Theoretical Chemistry