Adsorption of Thiolates to Singly Coordinated Sites on Au(111) Evidenced by Photoelectron Diffraction

Kondoh, Hiroshi; Iwasaki, M.; Shimada, Toru; Amemiya, Kenta; Yokoyama, Toshihiko; Ohta, Toshiaki; Shimomura, Masaru; Kono, S.

doi:10.1103/physrevlett.90.066102

Cited by 234 publications

(238 citation statements)

References 21 publications

Supporting

Mentioning

203

Contrasting

Unclassified

Order By: Relevance

“…Presumably, this could be induced by dominant intermolecular interactions of nitrosoarene residues within the molecular layer leading to occupation of different adsorption sites of the Au(111) lattice by S atoms. As it is known from the literature, the geometric height difference between various adsorption sites of sulfur atoms on an Au(111) lattice is about 0.02 nm, 43 which is in good agreement with measured corrugation. The periodicity of the superstructure of 1.5 nm corresponds very well to 3 3 times that of the Au(111) lattice (a = 0.29 nm) indicating a 3 3 3 3  molecular arrangement, same as for SAMs of nitrosoarene derivatives studied in our recent paper.…”

Section: Self-assembled Layers On An Au(111) Surfacesupporting

confidence: 73%

Nitrosoarene Dimerization on Two- and Three-dimensional Gold Surfaces

et al. 2013

View full text Add to dashboard Cite

Abstract. In the present study, we investigated nitrosoarene dimerization on an Au(111) and on the surface of gold nanoparticles (AuNPs). High-resolution STM images revealed that 8-thiocyanatooctyl-4-nitrosobenzoate (NCS(CH 2 ) 8 OOCC 6 H 4 NO) forms well-ordered monolayer on an Au(111) surface displaying hexagonal 3 3 3 3  structure. AFM data indicated that this compound also dimerize on an Au(111) surface thus forming bilayers. On contrary, adsorption of 6-(4-nitrosophenoxy)hexane-1-thiol (HS(CH 2 ) 6 OC 6 H 4 NO) on an Au(111) leads only to poorly organized monolayer.Furthermore, it was found that nitrosoarene derivatives 8-thiocyanatooctyl-4-nitrosobenzoate (NCS(CH 2 ) 8 OOCC 6 H 4 NO) and 3-thiocyanatopropyl-4-nitrosobenzoate (NCS(CH 2 ) 3 OOCC 6 H 4 NO) are present as dimers on the surface of AuNPs. There is no appreciable quantity of dimeric species with free thiocyanate termini indicating interlinkage of AuNPs through azodioxide bonds. Besides the characteristic surface plasmon band, UV-vis spectra showed an additional red-shifted band that might have origin in aggregation of AuNPs. This was further supported by TEM revealing the appearence of larger aggregates in addition to smaller AuNPs.(doi: 10.5562/cca2023)

show abstract

Section: Self-assembled Layers On An Au(111) Surfacesupporting

confidence: 73%

Nitrosoarene Dimerization on Two- and Three-dimensional Gold Surfaces

et al. 2013

View full text Add to dashboard Cite

show abstract

“…From recent photoelectron diffraction data and X-ray standing wave analysis it was concluded, however, that thiolate molecules favor the on-top adsorption sites, where a sulphur atom is positioned on top of a single Au atom of the substrate [48,49].…”

Section: Structuresmentioning

confidence: 99%

Surface Dipoles and Work Functions of Alkylthiolates and Fluorinated Alkylthiolates on Au(111)

2006

View full text Add to dashboard Cite

We study the dipole formation at the surface formed by -CH 3 and -CF 3 terminated shortchain alkyl-thiolate monolayers on Au(111). In particular, we monitor the change in work function upon chemisorption using density functional theory calculations. We separate the surface dipole into two contributions, resulting from the gold-adsorbate interaction and the intrinsic dipole of the adsorbate layer, respectively. The two contributions turn out to be approximately additive. Adsorbate dipoles are defined by calculating dipole densities of free-standing molecular monolayers. The gold-adsorbate interaction is to a good degree determined by the Au-S bond only. This bond is nearly apolar and its contribution to the surface dipole is relatively small. The surface dipole of the self-assembled 2 monolayer is then dominated by the intrinsic dipole of the thiolate molecules. Alkyl-thiolates increase the work function of Au(111), whereas fluorinated alkyl-thiolates decrease it.

show abstract

“…[3][4][5][6][7][8][9][10][11][12] Various groups have studied the dissociative adsorption of dimethyl disulfide (DMDS) on Au(111), both theoretically 3,11 and experimentally. [13][14][15] In particular, Nuzzo et al 13 suggested, after employing a large variety of experimental methods including X-ray photoelectron spectroscopy (XPS), Auger electron spectroscopy (AES), high-resolution electron energy loss spectroscopy (HREELS), and thermal desorption spectroscopy (TDS), that the breaking of the (weak) S-S bond of DMDS leads to the formation of a) Electronic mail: barmparis@materials.uoc.gr. two methanethiolate-surface bonds on Au(111) at low coverage.…”

Section: Introductionmentioning

confidence: 99%

Thiolate adsorption on Au(${\bm {hkl}}$hkl) and equilibrium shape of large thiolate-covered gold nanoparticles

Barmparis

Honkala²,

Remediakis³

2013

The Journal of Chemical Physics

View full text Add to dashboard Cite

The adsorption of thiolates on Au surfaces employing density-functional-theory calculations has been studied. The dissociative chemisorption of dimethyl disulfide (CH3S−SCH3) on 14 different Au(hkl) is used as a model system. We discuss trends on adsorption energies, bond lengths, and bond angles as the surface structure changes, considering every possible Au(hkl) with h, k, l ⩽ 3 plus the kinked Au(421). Methanethiolate (CH3S-) prefers adsorption on bridge sites on all surfaces considered; hollow and on top sites are highly unfavourable. The interface tensions for Au(hkl)-thiolate interfaces is determined at low coverage. Using the interface tensions in a Wulff construction method, we construct atomistic models for the equilibrium shape of large thiolate-covered gold nanoparticles. Gold atoms in a nanoparticle change their equilibrium positions upon adsorption of thiolates towards shapes of higher sphericity and higher concentration of step-edge atoms.

show abstract

Adsorption of Thiolates to Singly Coordinated Sites on Au(111) Evidenced by Photoelectron Diffraction

Cited by 234 publications

References 21 publications

Nitrosoarene Dimerization on Two- and Three-dimensional Gold Surfaces

Nitrosoarene Dimerization on Two- and Three-dimensional Gold Surfaces

Surface Dipoles and Work Functions of Alkylthiolates and Fluorinated Alkylthiolates on Au(111)

Thiolate adsorption on Au(${\bm {hkl}}$hkl) and equilibrium shape of large thiolate-covered gold nanoparticles

Contact Info

Product

Resources

About