Results 221 to 230 of about 151,125 (267)
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Core–Shell Nanostructured Catalysts
Accounts of Chemical Research, 2012Novel nanotechnologies have allowed great improvements in the syn-thesis of catalysts with well-controlled size, shape, and surface properties. Transition metal nanostructures with specific sizes and shapes, for instance, have shown great promise as catalysts with high selectivities and relative ease of recycling.
Qiao, Zhang +4 more
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Magic Polyicosahedral Core-Shell Clusters
Physical Review Letters, 2004A new family of magic cluster structures is found by genetic global optimization, whose results are confirmed by density functional calculations. These clusters are Ag-Ni and Ag-Cu nanoparticles with an inner Ni or Cu core and an Ag external shell, as experimentally observed for Ag-Ni, and present a polyicosahedral character.
G. ROSSI +5 more
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Imaging & Microscopy, 2006
A method to produce nanoparticles with core-shell structure, having crystalline Ni3Si core and amorphous Si(O) shell is reported. The core-shell nanoparticles are extracted from a two phase metallic alloys by selective phase separation using electrochemical dissolution technique.
Debashis Mukherji +2 more
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A method to produce nanoparticles with core-shell structure, having crystalline Ni3Si core and amorphous Si(O) shell is reported. The core-shell nanoparticles are extracted from a two phase metallic alloys by selective phase separation using electrochemical dissolution technique.
Debashis Mukherji +2 more
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Hydride destabilization in core–shell nanoparticles
International Journal of Hydrogen Energy, 2014Abstract We present a model that describes the effect of elastic constraint on the thermodynamics of hydrogen absorption and desorption in biphasic core–shell nanoparticles, where the core is a hydride forming metal. In particular, the change of the hydride formation enthalpy and of the equilibrium pressure for the metal/hydride transformation are ...
PASQUINI, LUCA +6 more
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Photovoltaics with Piezoelectric Core−Shell Nanowires
Nano Letters, 2010We report on a theoretical discovery of a generic piezoelectric field in strained core-shell compound semiconductor nanowires. We show, using both an analytical model and numerical simulations based on fully electroelastically coupled continuum elasticity theory, that lattice-mismatch-induced strain in an epitaxial core-shell nanowire gives rise to an ...
Fredrik, Boxberg +2 more
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Stability of core–shell magnetite nanoparticles
Colloids and Surfaces B: Biointerfaces, 2014In the paper, we present three different types of magnetite nanoparticles which were prepared from co-percipitation of iron (II) and (III) chlorides in aqueous solution with and without SiO2 and from thermal decomposition of iron (III) acetylacetonate in nonaqeous solutions.
B, Kalska-Szostko +3 more
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Multifunctional composite core–shell nanoparticles
Nanoscale, 2011In this review paper, the state-of-the-art knowledge of the core-shell multifunctional nanoparticles (MNPs), especially with unique physiochemical properties, is presented. The synthesis methods were summarized from the aspects of both the advantages and the demerits.
Suying, Wei +5 more
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Layered and core-shell uniaxial absorbers
2014 16th International Conference on Transparent Optical Networks (ICTON), 2014We derive periodic multilayer absorbers with effective uniaxial properties similar to a perfectly matched layer (PML). This approximate representation of a PML is based on effective medium theory, and we call it an effective medium PML (EM-PML). We also show that cylindrical core-shell nanostructures derived from flat multilayers also exhibit very good
Rafal Kotynski +3 more
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Journal of Crystal Growth, 2013
Abstract The objective of this study is to grow Si–SiC core–shell nanowires (NWs) for bio-nano-sensors. The idea is to benefit from the electronic transport into the Si core NW and from the biocompatibility of the SiC shell all around the Si NW. Silicon nanowires (NWs) have been first obtained by a top-down approach.
Ollivier, M. +8 more
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Abstract The objective of this study is to grow Si–SiC core–shell nanowires (NWs) for bio-nano-sensors. The idea is to benefit from the electronic transport into the Si core NW and from the biocompatibility of the SiC shell all around the Si NW. Silicon nanowires (NWs) have been first obtained by a top-down approach.
Ollivier, M. +8 more
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Science, 2003
APPLIED PHYSICS In vibrational spectroscopy, the Raman effect, which generally is rather weak, can be enhanced by means of surface plasmons when molecules are adsorbed on the surface of rough silver films. Although the enhancement can be by several orders of magnitude, its variability has limited the easy quantification of spectra.
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APPLIED PHYSICS In vibrational spectroscopy, the Raman effect, which generally is rather weak, can be enhanced by means of surface plasmons when molecules are adsorbed on the surface of rough silver films. Although the enhancement can be by several orders of magnitude, its variability has limited the easy quantification of spectra.
openaire +1 more source