SUPERSTRUCTURES OF PB MONOLAYERS ELECTROCHEMICALLY DEPOSITED ON AG(111) - REPLY

In our original article [Phys. Rev. B 46, 12 899 (1992)] we observed a superstructure in lead underpotential deposits on Ag(111). In their p aper, Toney et al. point out that one should see a potential dependent variation in period and angle of the long-wavelength pattern. Using t he dimensionless ratio kappa of the long-wavelength periodicity of the moire pattern and the atomic spacing of the lead atoms we compare the calculated dependence of kappa based on the data by earlier grazing i ncidence x-ray-scattering experiments with data from scanning-tunnelin g-microscopy investigations. We find a potential dependence of the lea d nearest-neighbor distance close to the expected one. Horizontal disp lacements proposed by Toney et al. as an explanation of the superstruc ture could not be detected by scanning tunneling microscopy.