Phase behavior of the Au(111) surface: Discommensurations and kinks

Huang, Keqing; Gibbs, Doon; Zehner, D. M.; Sandy, Alec; Mochrie, S. G. J.

doi:10.1103/physrevlett.65.3313

Cited by 143 publications

(74 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The reconstruction can be described as a continuous commensurate-incommensurate transformation in which the surface layer is isotropically compressed relative to the underlying bulk lattice. A similar reconstruction occurring above 0.65 Tmhas also been reported for (111) oriented Au surfaces [62]. At lower temperatures, a 23 x ",/3 reconstruction has been observed in Au(111) that can be described as an insertion of an extra row of atoms every 23 rows on the surface [63].…”

Section: Surface Reconstructions Of Clean Metal Surfacessupporting

confidence: 50%

Surface and interface stress effects in thin films

Cammarata

1994

Progress in Surface Science

882

414

View full text Add to dashboard Cite

Surface and interface stresses in solids are defined and their role in the thermodynamics of solids is presented. A discussion concerning the physical meaning of these quantities is given, along with a review of selected theoretical calculations and experimental measurements. It is shown that for a solid phase with one or more of its dimensions smaller than about 10 nm, the surface and interface stresses can be principal factors in determining the equilibrium structure and behavior of the solid. In particular, the effects of surface and interface stresses on thin films are reviewed along with the related topic of surface reconstructions in metals.

show abstract

Section: Surface Reconstructions Of Clean Metal Surfacessupporting

confidence: 50%

Surface and interface stress effects in thin films

Cammarata

1994

Progress in Surface Science

882

414

View full text Add to dashboard Cite

show abstract

“…In fact, it has been clear for many years that some restructuring of this surface occurs as the thiolate SAM forms, because the clean Au(111) surface is, itself, reconstructed, and this reconstruction is lifted as the thiolate coverage increases [72]. In particular, the outermost atomic layer of clean Au(111) adopts a uniaxially-compressed hexagonal close-packing leading to an Au-Au interatomic spacing smaller that that of the underlying bulk [73,74,75]. The atomic density of this layer is 4.4% larger than that of the bulk layers below, and this surface layer rumples over the substrate to give a (23x3)rect.…”

Section: Reconstruction and Au Adatomsmentioning

confidence: 99%

The interface structure of n-alkylthiolate self-assembled monolayers on coinage metal surfaces

Woodruff

2008

Phys. Chem. Chem. Phys.

124

150

View full text Add to dashboard Cite

The current state of understanding of the structure of the metal/thiolate interface of nalkylthiolate 'self-assembled monolayers' (SAMs) on Cu(111), Ag(111) and Au (111) is reviewed. On Cu(111) and Ag (111) there is now clear evidence that adsorbate-induced reconstruction of the outermost metal layer occurs to a less atomically-dense structure, with the S head-group atom bonded to four-fold and three-fold coordinated hollow sites, respectively, and that intermolecular interaction plays some role in the periodicity of the resulting SAMs. On the far more heavily-studied Au(111) surface, the detailed interface structure remains controversial, but there is growing evidence for the role of Au-adatomthiolate moieties in the layer ordering.

show abstract

“…9 At room temperature, the (22 × 3) phase is stable, while the first-order phase transition to the (1 × 1) phase requires heating to 880 K under ultrahigh vacuum (UHV). 10 In an electrochemical environment, however, the phase transition can be induced by changing the electrode potential. The existence of this phase transition in electrochemical environments was first suggested by classical voltammetry.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of Metastable Nanoscale Island Growth and Dissolution at Electrochemical Interfaces by Time-Resolved Scanning Tunneling Microscopy

and

Borguet

2001

J. Phys. Chem. B

View full text Add to dashboard Cite

The dynamics of nanoscale island growth, stability, and dissolution, accompanying the potential-induced phase transitions between the (22 × 3) and (1 × 1) structures of the Au(111) surface in 0.1 M HClO 4 solution, have been investigated by potential pulse perturbation time-resolved scanning tunneling microscopy (P 3 TR-STM). Starting from a potential at which the reconstructed (22 × 3) phase is stable, a short positive potential pulse briefly brings the electrode to a potential at which the (1 × 1) phase is stable. This pulse induces a perturbation that lifts the Au(111)-(22 × 3) reconstruction completely, resulting in nanoscale island formation on the surface. The nanoscale islands are metastable and dissolve with time. The initial average island area and the island decay rate are related to the pulse amplitude and duration. The higher and longer the pulse, the smaller the average size of the islands produced and the more slowly the islands decay. This result reveals a "voltammetric annealing" process that may be important in stable island formation at electrochemical interfaces. The dynamics of individual islands are quite heterogeneous and nonmonotonic. Small islands decay faster than large islands. Even under metastable conditions, large islands frequently grow before ultimately decaying, providing evidence for electrochemical Ostwald ripening in this system. A simple model, based on perimeter detachment as the rate-limiting step, provides a qualitative explanation for the observed decay dynamics.

show abstract

Phase behavior of the Au(111) surface: Discommensurations and kinks

Cited by 143 publications

References 17 publications

Surface and interface stress effects in thin films

Surface and interface stress effects in thin films

The interface structure of n-alkylthiolate self-assembled monolayers on coinage metal surfaces

Dynamics of Metastable Nanoscale Island Growth and Dissolution at Electrochemical Interfaces by Time-Resolved Scanning Tunneling Microscopy

Contact Info

Product

Resources

About