Dependence on the deposition conditions in the adsorption of C6 H8 molecules on a Si (100) -2×1 surface

F. D'Amico, R. Gunnella, M. Shimomura, T. Abukawa, S. Kono

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1 Citation (Scopus)

Abstract

We studied the molecular 1,4-cyclohexadiene (CHD) adsorption at room temperature on a Si (100) -2×1 surface, from the first stages up to saturation [about half a monolayer (ML)] at two different deposition rates. The chemical configuration of the adsorbed CHD on the silicon surface was obtained by valence band and C 1s core level photoemission analyses. Such a molecular adsorption, at the earlier stages and low rates, showed only weak features of chemical bonding with Si; at higher coverages (θ>0.3 ML) and higher deposition rates, a chemisorption occurred with an upright structure of the molecule, in which one out of the two unsaturated π orbitals reacted to form a bond with the silicon dimer. The whole investigation is based on an accurate determination of the strongly asymmetric C 1s core level components obtained by means of an angular resolved photoelectron diffraction analysis.

Original languageEnglish
Article number165315
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume76
Issue number16
DOIs
Publication statusPublished - 2007 Oct 23

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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