Identification of an AgS2 Complex on Ag(110).
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To the knowledge, this is the first example of an isolated linear sulfur-metal-sulfur complex, based upon density functional theory (DFT) and its comparison with experimental observations including bias dependence and separation between complexes.Abstract:
Adsorbed sulfur has been investigated on the Ag(110) surface at two different coverages, 0.02 and 0.25 monolayers. At the lower coverage, only sulfur adatoms are present. At the higher coverage, there are additional bright features which we identify as linear, independent AgS2 complexes. This identification is based upon density functional theory (DFT) and its comparison with experimental observations including bias dependence and separation between complexes. DFT also predicts the absence of AgS2 complexes at low coverage, and the development of AgS2 complexes around a coverage of 0.25 monolayers of sulfur, as is experimentally observed. To our knowledge, this is the first example of an isolated linear sulfur-metal-sulfur complex.read more
Citations
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Shape- and size-specific chemistry of Ag nanostructures in catalytic ethylene epoxidation
Phillip Christopher,Suljo Linic +1 more
TL;DR: In this article, shape and size controlled synthesis of Ag nanoparticles is used to show that silver nanocubes exhibit higher selectivity than nanowires and nanospheres for a given shape, larger particles offer improved selectivity.
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Structure of chalcogen overlayers on Au(111): Density functional theory and lattice-gas modeling.
TL;DR: The modeling for all three chalcogens successfully explains the linear adatom rows observed at low coverages of ∼0.1 monolayer and leads to a new possible explanation for the experimentally observed phase with a (5 × 5) low energy electron diffraction (LEED) pattern at 0.28 ML.
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Enhanced Nanostructure Dynamics on Au(111) with Adsorbed Sulfur due to Au-S Complex Formation.
Peter M. Spurgeon,Da-Jiang Liu,Theresa L. Windus,Theresa L. Windus,James W. Evans,James W. Evans,Patricia A. Thiel,Patricia A. Thiel +7 more
TL;DR: In this paper, the presence of adsorbed sulfur (S) greatly enhances the decay rate of 2D Au islands in the vicinity of extended step edges on Au(111), and this enhancement is already significant at S coverages, θS, of a few hundredths of a monolayer (ML), and is most pronounced for 0.1-0.3 ML where the decay ratio is increased by a factor of around 30.
References
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Projector augmented-wave method
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