Uniaxial incommensurate phases at the Au(111) electrode

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Abstract

The structure of the Au(111) electrode has been investigated using surface X-ray scattering (SXS) in a variety of electrolytes. Although the underlying gold layers have hexagonal symmetry, the top most gold layer forms a rectangular, uniaxial incommensurate (px √3) structure in the absence of specific adsorption. The (px √3) structure is also observed for bismuth and iodine adlayers, where p continuously changes with potential (electrocompressibility).

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