Grazing incidence X-ray diffraction of lead monolayers at a silver (111) and gold (111) electrode/electrolyte interface

Journal Article · Thu Jan 14 04:00:00 EST 1988 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100312a047· OSTI ID:5490335

Samant, M G; Toney, M F; Borges, G L; Blum, L; Melroy, O R

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. When deposited on silver, the lead orders in a hexagonal close-packed (hcp) geometry with the lead lattice compressed 1.2% relative to bulk lead. A rotational epitaxy angle of 4.4/sup 0/ was observed. From the width of the first-order diffraction peak, the domain size was determined to be > 150 A, indicating that even immersed in 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 geometry, incommensurate with the gold. The lead layer was compressed 0.7% relative to bulk lead, with a domain size > 100 A.

• Research Organization: IBM Almaden Research Center, San Jose, CA
• OSTI ID: 5490335
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 220-225:1; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400 -- Electrochemistry
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
DIFFRACTION
ELECTRODES
ELECTROLYTES
ELEMENTS
GOLD
HCP LATTICES
HEXAGONAL LATTICES
LEAD
METALS
MILLER INDICES
MONOCRYSTALS
SCATTERING
SILVER
TRANSITION ELEMENTS
X-RAY DIFFRACTION