Abstract
The stability of a reconstructed Au(100)-(5 × 20) surface in the presence of urea, thiourea pyridine and pyrazine has been studied over a wide concentration range. It is shown that adsorption of these organic additives shifts the potential for the (5 × 20) → (1 × 1) structural transition to negative values and hence reduces the stability range of the reconstructed surface. It is also demonstrated that the organic molecules have an influence on the potential-induced reconstruction. Our results clearly reveal that surface reconstruction, particularly potential-induced, has to be taken into account in a detailed adsorption study of Au(100).
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