Titre :

Atom probe tomography of au-cu bimetallic nanoparticles synthesized by inert gas condensation

Auteur(s) :

Yang, Q. [Auteur]
Danaie, M. [Auteur]
Young, N. [Auteur]
Broadley, V. [Auteur]
Joyce, D. E. [Auteur]
Martin, T. L. [Auteur]
Marceau, Eric [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Moody, M. P. [Auteur]
Bagot, Paul A. J. [Auteur]

Titre de la revue :

Journal of Physical Chemistry C

Nom court de la revue :

J. Phys. Chem. C

Numéro :

123

Pagination :

26481-26489

Date de publication :

2019-10-31

ISSN :

1932-7447

Discipline(s) HAL :

Chimie/Catalyse

Résumé en anglais : [en]

The inert gas condensation method (IGC) produces multimetallic nanoparticles in a metastable state that may exhibit heterogeneities of size, structure, and composition. The deposition of IGC-fabricated nanoparticles on ...
Lire la suite >The inert gas condensation method (IGC) produces multimetallic nanoparticles in a metastable state that may exhibit heterogeneities of size, structure, and composition. The deposition of IGC-fabricated nanoparticles on substrates allows for a detailed characterization by combination of aberration-corrected scanning transmission electron microscopy (TEM) and atom probe tomography (APT). Multiple particle monitoring and high-resolution scanning TEM give access to the size distribution of Au–Cu nanoparticles (<10 nm in diameter, bimodal distribution). TEM and APT show that the alloying between Cu and Au may stabilize the Ih structure for smaller particles (<4 nm). Combining high-resolution scanning transmission electron microscopy/energy dispersive X-ray and three-dimensional composition analysis by APT reveals that an excess of Cu may be present in a shell around the larger particles (>7 nm), while Cu is more randomly distributed in smaller particles.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

CNRS
Centrale Lille
ENSCL
Univ. Artois
Université de Lille

Collections :

• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Équipe(s) de recherche :

Matériaux pour la catalyse (MATCAT)

Date de dépôt :

2022-03-02T07:13:22Z
2024-01-15T16:37:19Z