Accession Number:

ADA265900

Title:

Electrode Potential-Induced Reconstruction of Au(100): Effect of Chemisorption of Nanoscale Dynamics as Probed by In-Situ Scanning Tunneling Microscopy

Descriptive Note:

Corporate Author:

PURDUE UNIV LAFAYETTE IN DEPT OF CHEMISTRY

Personal Author(s):

Report Date:

1993-04-01

Pagination or Media Count:

21.0

Abstract:

The effect of iodide chemisorption on the nanoscale real-space dynamics associated with the electrode potential-induced formation and removal of the hexagonal reconstruction on Au100 in aqueous solution has been examined by means of in-situ scanning tunneling microscopy under potentiodynamic conditions. Unlike in non-adsorbing media such as perchloric acid where the 1 x 1 yields hex phase change is slow T 12 approx. 10 min, requiring adatom diffusion from terrace edges, the potential-induced transition in iodide can be remarkably rapid 0.2 s. The latter features facile large-scale ca 10-20 nm gold mass transport emanating from former 1 x 1 terraces as well as from terrace edges. The likely roles of chemisorption in inducing such remarkably rapid reconstruction are briefly discussed.

Subject Categories:

  • Inorganic Chemistry
  • Physical Chemistry
  • Atomic and Molecular Physics and Spectroscopy
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE