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Mostrando ítems 1-10 de 26
Artículo
Pt-impregnated catalysts on powdery SiC and other commercial supports for the combustion of hydrogen under oxidant conditions
(Elsevier, 2016)
We report the study of the catalytic hydrogen combustion over Pt-impregnated powdery silicon carbide (SiC) using H2PtCl6 as precursor. The reaction was conducted in excess of oxygen. β-SiC was selected for the study because ...
Artículo
Magnetometry and electron paramagnetic resonance studies of phosphine- and thiol-capped gold nanoparticles
(American Institute of Physics, 2010)
In the last years, the number of studies performed by wholly independent research groups that confirm the permanent magnetism, first observed in our research lab, for thiol-capped Au nanoparticles (NPs) has rapidly increased. ...
Artículo
Characterisation of Co@Fe3O4 core@shell nanoparticles using advanced electron microscopy
(Royal Society of Chemistry, 2013)
Cobalt nanoparticles were synthesised via the thermal decomposition of Co2(CO)8 and were coated in iron oxide using Fe(CO)5. While previous work focused on the subsequent thermal alloying of these nanoparticles, this study ...
Artículo
On the formation of the porous structure in nanostructured a-Si coatings deposited by dc magnetron sputtering at oblique angles
(Institute of Physics Publishing, 2014)
The formation of the porous structure in dc magnetron sputtered amorphous silicon thin films at low temperatures is studied when using helium and/or argon as the processing gas. In each case, a-Si thin films were simultaneously ...
Artículo
Microstructural characterization of hydrophobic Ti1−xAlxN coatings with moth-eye-like surface morphology
(Elsevier, 2012-09-25)
Ti1−xAlxN thin films with different Al content were deposited by magnetron sputtering. The combination of electron energy loss spectroscopy (EELS) and energy dispersive spectroscopy (EDS) was used to evaluate the composition ...
Artículo
Dependence of exchange anisotropy and coercivity on the Fe–oxide structure in oxygen-passivated Fe nanoparticles
(American Institute of Physics, 1999)
Ultrafine Fe particles have been prepared by the inert gas condensation method and subsequently oxygen passivated. The as-obtained particles consist in an Fe core surrounded by an amorphous Fe-oxide surface layer. The ...
Artículo
STEM-in-SEM high resolution imaging of gold nanoparticles and bivalve tissues in bioaccumulation experiments
(Royal Society of Chemistry (Great Britain), 2015)
The methodology termed scanning transmission electron microscopy in scanning electron microscopy (STEM-in-SEM) has been used in this work to study the uptake of citrate stabilized gold nanoparticles (AuNPs) (average particle ...
Artículo
Investigation of a Pt containing washcoat on SiC foam for hydrogen combustion applications
(Elsevier, 2016)
A commercial Pt based washcoat, used for catalytic methane combustion, was studied supported on a commercial SiC foam as catalytic material (Pt/SiC) for catalytic hydrogen combustion (CHC). Structural and chemical ...
Artículo
Behaviour of Au-citrate nanoparticles in seawater and accumulation in bivalves at environmentally relevant concentrations
(2013-03)
The degree of aggregation and/or coalescence of Au-citrate nanoparticles (AuNPs, mean size 21.5 ± 2.9 nm), after delivery in simulated seawater, are shown to be concentration-dependent. At low concentrations no coalescence ...
Artículo
Characterization and Validation of a‑Si Magnetron-Sputtered Thin Films as Solid He Targets with High Stability for Nuclear Reactions
(American Chemical Society, 2016)
In this work, we present our magnetron sputtering based methodology to produce amorphous silicon coatings with closed porosity, as a strategy to fabricate solid helium targets, in the form of supported or self-supported ...