Accession Number:

ADA276633

Title:

A New-Type of Long-Range Restructuring of Ordered Metal Surfaces Induced by Lateral Adsorbate Interactions: Iodide on AU(110) Electrodes

Descriptive Note:

Technical rept.

Corporate Author:

PURDUE UNIV LAFAYETTE IN DEPT OF CHEMISTRY

Personal Author(s):

Report Date:

1994-02-01

Pagination or Media Count:

19.0

Abstract:

A new form of long-range surface restructuring of Au110 is reported, specifically for Au110 in aqueous iodide electrolyte at high electrode potentials where an ordered iodide adlayer is present. In-situ scanning tunneling microscopy reveals the formation of periodic terrace strips paralleling the direction with widths, ca 25-40 A, that diminish as the surface potential is increased. The 1 x 1 substrate unit cell, however, remains unaffected. The restructuring is postulated to be due to dipole-dipole repulsive interactions destabilizing terrace sites distant from steps, and hence limiting the size of the substrate-adlayer domains.

Subject Categories:

  • Physical Chemistry
  • Electricity and Magnetism
  • Atomic and Molecular Physics and Spectroscopy
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE