Electrode Potential-Induced Reconstruction of Au(100): Effect of Chemisorption of Nanoscale Dynamics as Probed by In-Situ Scanning Tunneling Microscopy
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 Au(100) 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 1/2 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1993
- Accession Number
- ADA265900
Entities
People
- Michael J. Weaver
- Xiaoping Gao
Organizations
- Purdue University