Adsorption and thermal reaction of C70 on Si(111)-(7 × 7) and Si(100)-(2 × 1) surfaces: Comparison with C60

Takanori Wakita, Kazuyuki Sakamoto, Atsuo Kasuya, Yuichiro Nishina, Shozo Suto

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We report here the measurements of vibrational excitation spectra and the temperature dependence of C70 molecules adsorbed on Si(111)-(7 × 7) and Si(100)-(2 × 1) surfaces using high-resolution electron-energy-loss spectroscopy. It is found that a strong interaction of the C70 molecule with the Si(100) surface is induced after annealing at 873 K and that the C70 cage is easier to decompose on that surface. SiC films are formed at 1273 K and 1073 K on the Si(111)-(7 × 7) and Si(100)-(2 × 1) surfaces, respectively. Moreover, the formation temperature of 1073 K is lower by 50 K than that of the SiC film from C60 on a Si(100)-(2 × 1) surface. We discuss the reactivity and the formation temperature of SiC films in terms of the interaction of C70 with the substrates.

Original languageEnglish
Pages (from-to)653-656
Number of pages4
JournalApplied Surface Science
Volume144-145
Issue number0
Publication statusPublished - Apr 1999
Externally publishedYes

Fingerprint

Adsorption
adsorption
Molecules
Electron energy loss spectroscopy
Temperature
molecules
reactivity
energy dissipation
Hot Temperature
Annealing
electron energy
temperature dependence
annealing
temperature
high resolution
Substrates
spectroscopy
excitation
interactions

Keywords

  • Electron energy loss spectroscopy
  • Fullerenes
  • Silicon
  • Silicon carbide
  • Vibrations of adsorbed molecules

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Condensed Matter Physics

Cite this

Adsorption and thermal reaction of C70 on Si(111)-(7 × 7) and Si(100)-(2 × 1) surfaces : Comparison with C60. / Wakita, Takanori; Sakamoto, Kazuyuki; Kasuya, Atsuo; Nishina, Yuichiro; Suto, Shozo.

In: Applied Surface Science, Vol. 144-145, No. 0, 04.1999, p. 653-656.

Research output: Contribution to journalArticle

Wakita, Takanori ; Sakamoto, Kazuyuki ; Kasuya, Atsuo ; Nishina, Yuichiro ; Suto, Shozo. / Adsorption and thermal reaction of C70 on Si(111)-(7 × 7) and Si(100)-(2 × 1) surfaces : Comparison with C60. In: Applied Surface Science. 1999 ; Vol. 144-145, No. 0. pp. 653-656.
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