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Issue 6, 2016
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Identification of Au–S complexes on Au(100)

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Abstract

Using a combination of scanning tunneling microscopy and density functional theory (DFT) calculations, we have identified a set of related Au–S complexes that form on Au(100), when sulfur adsorbs and lifts the hexagonal surface reconstruction. The predominant complex is diamond-shaped with stoichiometry Au4S5. All of the complexes can be regarded as combinations of S–Au–S subunits. The complexes exist within, or at the edges of, p(2 × 2) sulfur islands that cover the unreconstructed Au regions, and are observed throughout the range of S coverage examined in this study, 0.009 to 0.12 monolayers. A qualitative model is developed which incorporates competitive formation of complexes, Au rafts, and p(2 × 2) sulfur islands, as Au atoms are released by the surface structure transformation.

Graphical abstract: Identification of Au–S complexes on Au(100)

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Publication details

The article was received on 17 Dec 2015, accepted on 14 Jan 2016 and first published on 25 Jan 2016


Article type: Paper
DOI: 10.1039/C5CP07817B
Phys. Chem. Chem. Phys., 2016,18, 4891-4901

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    Identification of Au–S complexes on Au(100)

    H. Walen, D. Liu, J. Oh, H. J. Yang, Y. Kim and P. A. Thiel, Phys. Chem. Chem. Phys., 2016, 18, 4891
    DOI: 10.1039/C5CP07817B

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