Grazing Incidence X-Ray Diffraction of Lead Monolayers at a Silver (111) and Gold (111) Electrode/Electrolyte Interface.

Abstract

Using grazing incidence geometry and a thin layer cell, x-ray scattering has been used to study the structure of electrochemically deposited monolayers of lead on silver (111) and gold (111) electrodes in-situ. For the lead monolayer deposited on sliver, the lead was found to order in a hexagonoal closed packed (hcp) geometry with the lead lattice compresssed 1.2% relative to bulk lead. A rotational epitaxy angle of 4.4 deg was observed. From the width of the first order diffraction peak, the domain size of the lead was determined to be > 300 A indicating that even when deposited from a solution, the lead forms a well ordered two-dimensional solid. On a gold (111) substrate, the lead monolayer was again found to order into a hcp layer, incommensurate with the gold. The lead was compressed 0.7% relative to bulk lead, with a domain size > 200 A. Keywords: X-ray electrode; Lead(Metal); Gold electrode; Interface structure; Electrodeposition.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
May 12, 1987
Accession Number
ADA181046

Entities

People

  • Gary L. Borges
  • Lesser Blum
  • Mahesh G. Samant
  • Michael F. Toney
  • Owen R. Melroy

Organizations

  • University of Puerto Rico

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Bragg Angle
  • Cells
  • Crystal Lattices
  • Crystal Structure
  • Crystals
  • Diffraction
  • Electrochemical Cells
  • Electrodeposition
  • Electrodes
  • Geometry
  • Measurement
  • Scattering
  • Three Dimensional
  • Two Dimensional
  • X Ray Scattering
  • X Rays
  • X-Ray Diffraction

Readers

  • Electrochemical Engineering/ Fuel Cell Technologies
  • Nanofabrication and Microfabrication.
  • Thin Film Deposition Science.