Core-level photoemission from nanocluster-matrix composites: Au clusters in amorphous carbon

Calliari, L.; Minati, L.; Speranza, G.; París, Arturo Pérez; Baranov, Alexander; Fanchenko, S. D.

doi:10.1016/j.apsusc.2014.07.072

Cited by 5 publications

(3 citation statements)

References 33 publications

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“…amorphous carbon, C 60 ). [42,43] According to the mechanism causing the shift in BE, it appears that the final-state effect is independent of the substrate material. Nonetheless, among these systems, none displays such a large shift from the bulk value as that reported here.…”

Section: Aunps On A-npdmentioning

confidence: 97%

Organic Semiconductor/Gold Interface Interactions: From Physisorption on Planar Surfaces to Chemical Reactions with Metal Nanoparticles

2015

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The interaction of gold nanoparticles (AuNPs) with prototypical organic semiconductors used in optoelectronics, namely, tris(8-hydroxyquinoline)aluminium (Alq3 ) and 4,4-bis[N-(1-naphthyl)-N-phenylamino]diphenyl (α-NPD), is investigated in situ by X-ray photoelectron spectroscopy (XPS). These AuNPs-on-molecule experiments are compared with the reversed molecule-on-Au cases. The molecules-on-Au systems show only weak interactions, and the evolution of the XP spectra is dominated by final-state effects. In contrast, in the AuNPs-on-molecules cases, both initial-state effects and final-state effects occur. Spectral features arising for both molecules and metal indicate charge transfer and the formation of organometallic complexes (initial-state effects). The energy shift in the metal emission underlines the size-induced nanometric nature of the molecule/Au interaction (final-state effects). Consequently, the chemical interaction between metals and organic semiconductors likely depends strongly on the deposition sequence in general.

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Section: Aunps On A-npdmentioning

confidence: 97%

Organic Semiconductor/Gold Interface Interactions: From Physisorption on Planar Surfaces to Chemical Reactions with Metal Nanoparticles

2015

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“…This component disappears for the highest incidence angles (75°-85°). In [58] both the line broadening and the chemical shift have been attributed to the presence of Au nanoclusters, also observing that they both monotonically increase as the cluster size decreases. In addition, in [59,60] the shoulder at higher binding energy have been assigned to Au 3+ (Au 2 O 3 ) species, also following previous assignment.…”

Section: Xps and Tem-edxmentioning

confidence: 94%

The role of incidence angle in the morphology evolution of Ge surfaces irradiated by medium-energy Au ions

Dell’Anna

Iacob

Barozzi

et al. 2018

J. Phys.: Condens. Matter

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Germanium (Ge) surfaces have been irradiated with 26 keV gold (Au) ions at a constant fluence and at incidence angles varying from 0° to 85°. The evolution of the emerging nanostructures is studied by atomic force microscopy (AFM), scanning electron microscopy, x-ray photoelectron spectroscopy (XPS), and cross-sectional transmission electron microscopy. The obtained results are compared with findings reported in the literature. Periodic rippled patterns with the wave vector parallel to the projection of the ion beam direction onto the Ge surface develop between 30° and 45°. From 75° the morphology changes from parallel-mode ripples to parallel-mode terraces, and by further increasing the incidence angle the terraces coarsen and show a progressive break-up of the front facing the ion beam. No perpendicular-mode ripples or terraces have been observed. The analysis of the AFM height profiles and slope distributions shows in the 45°-85° range an angular dependence of the temporal scale for the onset of nonlinear processes. For incidence angles below 45°, the surface develops a sponge-like structure, which persists at higher incidence angles on the top and partially on the face of the facets facing the ion beam. The XPS and the energy-dispersive x-ray spectroscopy evidence the presence of Au nano-aggregates of different sizes for the different incidence angles. This study points out the peculiar behavior of Ge surfaces irradiated with medium-energy Au ions and warns about the differences to be faced when trying to build a universal framework for the description of semiconductor pattern evolution under ion-beam irradiation.

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“…Even though the magnetron sputtering technology is well known [16], in this work we present the results of magnetron sputtering co-deposition of graphite/platinum catalyst on the porous substrate. The deposited catalyst consists of an amorphous carbon matrix (a-C) which includes metal nanoclusters [17], platinum in our case.…”

Section: Magnetron Sputteringmentioning

confidence: 99%

Design and investigation of thin film nanocomposite electrodes for electrochemical sensors

Медведева

Baranov

Somov

2016

Sensors and Actuators B: Chemical

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Core-level photoemission from nanocluster-matrix composites: Au clusters in amorphous carbon

Cited by 5 publications

References 33 publications

Organic Semiconductor/Gold Interface Interactions: From Physisorption on Planar Surfaces to Chemical Reactions with Metal Nanoparticles

Organic Semiconductor/Gold Interface Interactions: From Physisorption on Planar Surfaces to Chemical Reactions with Metal Nanoparticles

The role of incidence angle in the morphology evolution of Ge surfaces irradiated by medium-energy Au ions

Design and investigation of thin film nanocomposite electrodes for electrochemical sensors

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