Study of Underpotential Deposited Copper on Gold by Fluorescent EXAFS.

Abstract

Using grazing incidence geometry and fluorescense detection, surface EXAFS of a monolayer of underpotential deposited copper on epitaxially deposited gold (III) on mica was observed. The results are interpreted in terms of models in which the Cu-Oxygen distance is 1.07 + or - .03 A and the Cu-Au distance is 2.55 + or - .06.A. The copper and three gold atoms at the metallic surface form an elongated tetrahedron, with the oxygen right on top of the copper. Two plausible models for the oxygen arrangement are proposed, one with only one oxygen right on top, and another one with a sulfate ion. This second model yields a slightly better fit of the data.

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Document Details

Document Type
Technical Report
Publication Date
May 27, 1986
Accession Number
ADA168944

Entities

People

  • G. Borges
  • Héctor D. Abruña
  • J. G. Gordon Ii
  • J. White
  • Lesser Blum

Organizations

  • University of Puerto Rico

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Amplitude
  • Backscattering
  • Chemistry
  • Detection
  • Detectors
  • Diffraction
  • Films
  • Geometry
  • Intensity
  • Measurement
  • Phase Shift
  • Physics
  • Puerto Rico
  • Research Facilities
  • Scattering
  • Spectra
  • X Rays

Fields of Study

  • Physics

Readers

  • Electrochemical Surface Science
  • Materials Science and Engineering.
  • Thin Film Deposition Science.