Scanning tunneling microscopy and quartz crystal microbalance studies of Au exposed to sulfide, thiocyanate, and n-octadecanethiol
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
McCarley, R., Kim, Y., & Bard, A. (1993). Scanning tunneling microscopy and quartz crystal microbalance studies of Au exposed to sulfide, thiocyanate, and n-octadecanethiol. Journal of Physical Chemistry, 97 (1), 211-215. https://doi.org/10.1021/j100103a036