HREELS study of C70 molecules adsorbed on a Si(1 1 1)-(7×7) surface

Takanori Wakita, Kazuyuki Sakamoto, Shozo Suto

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We have measured the coverage dependence of vibrational excitation spectra of C70 molecules adsorbed on a Si(1 1 1)-(7×7) surface using high-resolution electron-energy-loss spectroscopy. At the monolayer coverage, the intensity of the 57 meV peak increases, and those of the 83 and 178 meV peaks decrease. Taking into account the dipole selection rule, the change in intensity of the 57 meV peak indicates that the average angle between the long axes of C70 molecules and surface normal is about 40°. The decreases in intensities of the 83 and 178 meV peaks suggest that the rotational motion of molecules is quenched upon adsorption. We will discuss the Coriolis interaction between the accidentally degenerate A″2 and E′1 modes.

Original languageEnglish
Pages (from-to)147-152
Number of pages6
JournalApplied Surface Science
Volume169-170
DOIs
Publication statusPublished - Jan 15 2001
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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