Interaction of C60 with Si(111) 7 × 7 and Si(100) 2 × 1 surfaces studied by STM, PES and HREELS: annealing effect

S. Suto, K. Sakamoto, D. Kondo, T. Wakita, A. Kimura, A. Kakizaki, C. W. Hu, A. Kasuya

Research output: Contribution to journalConference article

19 Citations (Scopus)

Abstract

We report here measurements of the valence band spectra, the C 1s core level spectra and the vibrational excitation spectra of a C60 monolayer (ML) film on Si(111) 7 × 7 and Si(100) 2 × 1 surfaces, using photoelectron spectroscopy and high-resolution electron energy loss spectroscopy (HREELS) in combination with scanning tunneling microscopy. 1 ML films are formed after annealing the 5 ML films at 670 K. The bonding states between C60 molecules and Si substrates are clearly observed at 2.1 eV on both surfaces in the valence band spectra. The shift of binding energies of the molecular orbitals and the C 1s core level spectra indicate the charge transfer. The softening of several vibrational modes is observed on the Si(111) 7 × 7 and Si(100) 2 × 1 surfaces with HREELS. The charge transfer scheme explains the softening well. We discuss the bonding nature in terms of hybridization of C60 molecular orbitals with the surface states.

Original languageEnglish
Pages (from-to)242-247
Number of pages6
JournalSurface Science
Volume438
Issue number1-3
DOIs
Publication statusPublished - Sep 10 1999
Externally publishedYes
EventProceedings of the 1998 International Symposium on Surface and Interface: Properties of Different Symmetry Crossing 98 (ISSI PDSC-98) - Tokyo, Jpn
Duration: Nov 19 1998Nov 21 1998

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Interaction of C<sub>60</sub> with Si(111) 7 × 7 and Si(100) 2 × 1 surfaces studied by STM, PES and HREELS: annealing effect'. Together they form a unique fingerprint.

  • Cite this