Spectroscopic evidence for carbon-carbon bonding in "carbidic" layers on metals

F. L. Hutson, D. E. Ramaker, B. E. Koel

Research output: Contribution to journalArticle

28 Scopus citations

Abstract

We examine previously reported ultraviolet photoelectron, C K electron energy loss, and CKVV Auger spectroscopic data from "carbidic" layers formed at temperatures between 500 and 650 K on Ni(100) and Ni(111). The "carbidic" layers studied were made from either CO or C2H4 exposure to the metal surface. These data indicate that significant amounts of carbon-carbon bonding exists on the surface in addition to the carbon-metal bonding with the substrate, revealing the presence of chemisorbed species, such as C2, and maybe even C3, etc. Quantitative interpretations of the Auger data indicate that 20 to 30% of the total electron density has carbon-carbon bonding character. Observed changes in the spectra obtained from different surfaces or at different coverages are accounted for by variations in the fraction of carbon-carbon bonding character.

Original languageEnglish (US)
Pages (from-to)104-118
Number of pages15
JournalSurface Science
Volume248
Issue number1-2
DOIs
StatePublished - May 3 1991
Externally publishedYes

All Science Journal Classification (ASJC) codes

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

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