Silver nanostructures on a c(4×2)-NiOx/Pd(100) monolayer

Agnoli, Stefano; Sambi, Mauro; Rizzi, G.; Parteder, G.; Surnev, S.; Netzer, F.P.; Granozzi, G.

doi:10.1016/j.susc.2007.10.047

Cited by 2 publications

(1 citation statement)

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“…According to existing STM and photoemission data, the ultrathin films is either restructured 36 or displaced 37 and the deposited metal goes directly in contact to the interface with the substrate. Similarly, in the case of Ag/c(4 Â 2)NiO x /Pd(100) system, a (100)[001]//(100)[001] epitaxial relation of the Ag NPs with the Pd(100) substrate has been demonstrated, 38 but evidence from XPS and AS-PD data suggested the possibility that the c(4 Â 2)-NiO x phase was altered after the Ag deposition.…”

Section: Discussionmentioning

confidence: 99%

Au nanoparticles on a templating TiOx/Pt(111) ultrathin polar film: a photoemission and photoelectron diffraction study

Rizzi

Sedona

Artiglia

et al. 2009

Phys. Chem. Chem. Phys.

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We present an in-depth investigation of Au nanoparticles self-assembled on a zigzag-like TiO(x)/Pt(111) ultrathin polar film, whose structure is known in great detail. The peculiar pattern of defects (picoholes) templates a linear array of size-selected (ca. 1 nm) Au nanoparticles without disruption of the titania layer, as observed by scanning tunneling microscopy. Their structure and electronic properties have been investigated by several large-area spectroscopic tools, i.e. high-resolution core and valence level photoemission and angle-scanned and energy-scanned photoelectron diffraction. The comparison between experimental data and density functional theoretical calculations indicates that the Au atoms landing on the oxide film are rather mobile, and that the picoholes can act as effective trapping and nucleation centers for the growth of the Au nanoparticles. All the experimental results are in concord in indicating that the Au NPs are flat islands with a maximum thickness of 2-3 layers exposing the (111) surface.

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Section: Discussionmentioning

confidence: 99%