Accession Number:

ADA243218

Title:

In Situ Surface X-Ray Crystallography of Electrochemically Deposited BI on AG (111): Structure, Compressibility, and Anisotropy

Descriptive Note:

Summary rept.,

Corporate Author:

PUERTO RICO UNIV RIO PIEDRAS DEPT OF PHYSICS

Report Date:

1991-01-29

Pagination or Media Count:

14.0

Abstract:

We have performed in-situ x-ray diffraction measurements on an underpotentially deposited monolayer of Bismuth on Silver 111. The Biforms a two-dimensional nearly centered rectangular structure that is uniaxially commensurate with the Silver 111 surface. The Bi monolayer compresses uniaxially along the incommensurate direction. Neither the Bi structure nor its compressibility is affected by the presence or absence of chloride in the electrolyte. Initial crystallographic analysis reveals that the nearly centered atom is displaced by approximately 0.35A along the commensurate direction, and that the atomic disorder in the monolayer is anisotropic.

Subject Categories:

  • Physical Chemistry
  • Fabrication Metallurgy
  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE