Title

Scanning tunneling microscopy and quartz crystal microbalance studies of Au exposed to sulfide, thiocyanate, and n-octadecanethiol

Document Type

Article

Publication Date

1-1-1993

Abstract

Atomic resolution STM images of Au(111) treated with solutions of Na2S, H2S, or NaSCN display patterns of atoms in the shape of squares with nearest-neighbor distances of 0.27 ± 0.3 nm. QCM data demonstrate that Au dissolves in aqueous solutions of sulfide and thiocyanate with O2 present. The square pattern observed is ascribed to images of Au atoms on a reconstructed Au(111) surface caused by dissolution of Au by sulfide or thiocyanate. n-Octadecanethiol/Au(111) surfaces damaged by the STM tip display a similar square pattern, indicating removal of Au atoms by the tip in a manner analogous to the dissolution process observed for sulfide or thiocyanate. © 1993 American Chemical Society.

Publication Source (Journal or Book title)

Journal of Physical Chemistry

First Page

211

Last Page

215

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