Spectroscopic Evidence for Carbon-Carbon Bonding in Carbide Layers on Metals

Abstract

We examine previously reported ultraviolet photoelectron, C K electron energy loss, and C KVV Auger spectroscopic data from 'carbidic' layers formed at temperatures between 500-650K on Ni(100), Ru(001), and other metals. These data indicate that significant amounts of carbon-carbon bonding, such as that from C2, C3, etc. fragments, exists on the surface in addition to the carbon-metal bonding with the substrate. The carbidic layers can be made from either CO or C2H2 exposure to the metal substrate. Quantitative interpretation of the Auger data indicate that the carbon-carbon to carbon-metal bonding ratio lies between 0.3 and 0.5. Observed changes in the spectra obtained from different surfaces or at different coverages are accounted for by variations in this ratio. (aw)

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1989
Accession Number
ADA216726

Entities

People

  • B. E. Koel
  • David E. Ramaker
  • F. L. Hutson

Organizations

  • George Washington University

Tags

Communities of Interest

  • C4I

DTIC Thesaurus Topics

  • Carbon Carbon Composites
  • Electron Energy
  • Electrons
  • Energy
  • Photoelectrons
  • Plastic Explosives
  • Spectra
  • Substrates

Readers

  • Electrochemical Engineering/ Fuel Cell Technologies
  • Quantum Chemistry

Technology Areas

  • Fully Networked C3
  • Microelectronics
  • Microelectronics - Graphene