AVS 52nd International Symposium
    Surface Science Monday Sessions
       Session SS-MoP

Paper SS-MoP7
Interaction of Sulphur-Containing Anions with Copper Single Crystal Electrodes

Monday, October 31, 2005, 5:00 pm, Room Exhibit Hall C&D

Session: Surface Science Poster Session
Presenter: A. Spänig, University of Bonn, Germany
Authors: J. Hommrich, University of Bonn, Germany
S. Hümann, University of Bonn, Germany
P. Broekmann, University of Bonn, Germany
K. Wandelt, University of Bonn, Germany
A. Spänig, University of Bonn, Germany
Correspondent: Click to Email
Processes at metal/electrolyte interfaces are a promising route to modify and structure surfaces on the nanometer scale. This, because processes at metal/electrolyte interfaces may be easier to control than those in vacuum, and are probably more economic. In this contribution we summarize results for sulphur-containing anion adsorption from solution on single crystal copper electrodes as obtained with in-situ ElectroChemical Scanning Tunneling Microscopy (ECSTM) and Fourier-Transform Infrared Spectroscopy (FTIRS) in combination with ex-situ surface analytical methods like AES, LEED, XPS, ISS etc. Hetero-atoms like, for instance, sulphur are often the anchors through which organic molecules are bound to surfaces. In particular, results will be presented and discusses for the most basic anionic groups, namely SO@sub 4@@super 2-@ and S@super 2-@, as well as derivatives thereof like sulfonate and thiocyanate anions on Cu(111) and Cu(100) electrodes. Special emphasis will be placed on the adsorbate structure and dynamics, on structural phase transitions, adsorption induced surface reconstruction as well as chemical stability as a function of electrode potential.