The atomic structures of several distinct adlayers of Cd underpotentially deposited onto a Au(111) surface in sulfuric acid electrolyte were revealed by in situ scanning tunneling microscopy (STM). Three ordered adlattices were observed, all of which have a long-range linear morphology rotated by 30° from the substrate's lattice directions. Complete geometric descriptions and proposed structures are presented for each. A purely electrostatic model is insufficient to explain the banded morphology which is observed; therefore, other structure-forming interactions, including lattice strain, are discussed as possible contributors.

Observation of Uniaxial Structures of Underpotentially Deposited Cadmium on Au(111) with in Situ Scanning Tunneling Microscopy

D.M. Dražić

Papers

Studies of the deposition of cadmium on foreign substrates