CobaltMaghrebV1, France, Analysis, bibRecord, 000063

Trends in anomalous small-angle X-ray scattering in grazing incidence for supported nanoalloyed and core-shell metallic nanoparticles

Identifieur interne : 000063 ( France/Analysis ); précédent : 000062; suivant : 000064

Trends in anomalous small-angle X-ray scattering in grazing incidence for supported nanoalloyed and core-shell metallic nanoparticles

Auteurs : P. Andreazza [France] ; H. Khelfane [France, Algérie] ; O. Lyon [France] ; C. Andreazza-Vignolle [France] ; A. Y. Ramos [France] ; M. Samah [Algérie]

Source :

The European physical journal. Special topics [ 1951-6355 ] ; 2012.

RBID : Pascal:12-0338625

Descripteurs français

Pascal (Inist)
- Diffusion RX centrale, Incidence rasante, Structure atomique, Microstructure, Répartition spatiale, Limite absorption, Angle incidence, Analyse donnée, Diffusion anormale, Nanoparticule, Cobalt, Platine, Métal transition, Structure coeur coquille.
Wicri :
- topic : Cobalt, Platine.

English descriptors

KwdEn :
- Absorption edge, Anomalous diffusion, Atomic structure, Cobalt, Core shell structure, Data analysis, Grazing incidence, Incidence angle, Microstructure, Nanoparticles, Platinum, Small angle X ray scattering, Spatial distribution, Transition elements.

Abstract

As atomic structure and morphology of particles are directly correlated to their functional properties, experimental methods probing local and average features of particles at the nanoscale elicit a growing interest. Anomalous small-angle X-ray scattering (ASAXS) is a very attractive technique to investigate the size, shape and spatial distribution of nanoobjects embedded in a homogeneous matrix or in porous media. The anomalous variation of the scattering factor close to an absorption edge enables element specific investigations. In the case of supported nano-objects, the use of grazing incidence is necessary to limit the probed depth. The combination of grazing incidence with the anomalous technique provides a powerful new method, anomalous grazing incidence small-angle X-ray scattering (AGISAXS), to disentangle complex chemical patterns in supported multi-component nano-structures. Nevertheless, a proper data analysis requires accurate quantitative measurements associated to an adapted theoretical framework. This paper presents anomalous methods applied to nanoalloys phase separation in the 1-10 nm size range, and focuses on the application of AGISAXS in bimetallic systems: nanocomposite films and core-shell supported nanoparticles.

Affiliations:

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Pascal:12-0338625

Le document en format XML

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<term>Core shell structure</term>
<term>Data analysis</term>
<term>Grazing incidence</term>
<term>Incidence angle</term>
<term>Microstructure</term>
<term>Nanoparticles</term>
<term>Platinum</term>
<term>Small angle X ray scattering</term>
<term>Spatial distribution</term>
<term>Transition elements</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Diffusion RX centrale</term>
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<term>Microstructure</term>
<term>Répartition spatiale</term>
<term>Limite absorption</term>
<term>Angle incidence</term>
<term>Analyse donnée</term>
<term>Diffusion anormale</term>
<term>Nanoparticule</term>
<term>Cobalt</term>
<term>Platine</term>
<term>Métal transition</term>
<term>Structure coeur coquille</term>
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<front><div type="abstract" xml:lang="en">As atomic structure and morphology of particles are directly correlated to their functional properties, experimental methods probing local and average features of particles at the nanoscale elicit a growing interest. Anomalous small-angle X-ray scattering (ASAXS) is a very attractive technique to investigate the size, shape and spatial distribution of nanoobjects embedded in a homogeneous matrix or in porous media. The anomalous variation of the scattering factor close to an absorption edge enables element specific investigations. In the case of supported nano-objects, the use of grazing incidence is necessary to limit the probed depth. The combination of grazing incidence with the anomalous technique provides a powerful new method, anomalous grazing incidence small-angle X-ray scattering (AGISAXS), to disentangle complex chemical patterns in supported multi-component nano-structures. Nevertheless, a proper data analysis requires accurate quantitative measurements associated to an adapted theoretical framework. This paper presents anomalous methods applied to nanoalloys phase separation in the 1-10 nm size range, and focuses on the application of AGISAXS in bimetallic systems: nanocomposite films and core-shell supported nanoparticles.</div>
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Trends in anomalous small-angle X-ray scattering in grazing incidence for supported nanoalloyed and core-shell metallic nanoparticles

Trends in anomalous small-angle X-ray scattering in grazing incidence for supported nanoalloyed and core-shell metallic nanoparticles

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri