Metal core bonding motifs of monodispersed icosahedral [Au.sub.13] and larger Au monolayer-protected clusters as revealed by X-ray absorption spectroscopy and transmission electron microscopy
Article Abstract:
The quantitative the high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM) and high-resolution TEM measurements are carried out on subnanometer gold clusters that have indicated cluster cores of 13 atoms with average diameters of 0.8 nm. The experiments have provided direct evidence that [Au.sub.13] clusters adopt an icosahedral structure while those with average diameters near 2 nm adopt unrelaxed bonding habits characteristic of the bulk fcc structure.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2006
User Contributions:
Comment about this article or add new information about this topic:
Ultrafast electron transfer from oligo(p-phenylene-ethynylene)thiol to gold
Article Abstract:
The electron transfer dynamics of oligo(p-phenylene-ethynylene) (OPE) SAM on Au(111) is studied by resonant photoemission spectroscopy and the ultrafast electron transfer from OPE molecules to Au substrate. The time scale for the charge transfer is much less than 6 fs, the core-hole lifetime for Cls which strongly suggests that there is an intense interfacial electronic coupling between OPE molecules and the Au substrate.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2006
User Contributions:
Comment about this article or add new information about this topic:
Nanoparticle-mediated electron transfer across ultrathin self-assembled films
Article Abstract:
The electrochemical behavior of arrays of Au nanoparticles assembled on Au electrodes modified by 11-mercaptoudecanoic acid (MUA) and ply-L-lysine (PLYS) is investigated as a function of the particle number density. The sequential self-assembly of MUA and PLYS on Au surfaces generates ultrathin compact films with a homogeneous coverage and very low density of surface defects.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2005
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Intact and fragmented trisomium clusters on MgO: Characterization by X-ray absorption spectroscopy and high-resolution electron microscopy
- Abstracts: Effects of cations on the hydrogen bond network of liquid water: New results from X-ray absorption spectroscopy of liquid microjets
- Abstracts: Mechanism of the oxidation-reduction of the MoVSbNbO catalyst: In operando X-ray absorption spectroscopy and electrical conductivity measurements
- Abstracts: Sub-nanometer Au monolayer-protected clusters exhibiting molecule-like electronic behavior: Quantitative high-angle annular dark-field scanning transmission electron microscopy and electrochemical characterization of clusters with precise atomic stoichiometry
- Abstracts: Effect of lithium chloride on the palisade layer of the Triton-X-100 micelle: Two sites for lithium ions as revealed by solvation and rotational dynamics studies