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

Abstract

A new form of long-range surface restructuring of Au(110) is reported, specifically for Au(110) 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.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1994
Accession Number
ADA276633

Entities

People

  • Michael J. Weaver
  • Xiaoping Gao

Organizations

  • Purdue University

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Adsorbates
  • Atomic Structure
  • Atoms
  • Chemistry
  • Electrodes
  • Electrolytes
  • Energy
  • Metals
  • Microscopy
  • Military Research
  • Phase Transformations
  • Quantum Tunneling
  • Self Organizing Systems
  • Substrates
  • Surface Energy
  • Surface Tension
  • Two Dimensional

Fields of Study

  • Chemistry

Readers

  • Electrochemical Engineering/ Fuel Cell Technologies
  • Quantum Chemistry
  • Thin Film Deposition Science.