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Epitaxial Growth of a Gold Shell on Intermetallic FeRh Nanocrystals

Patrizio Benzo 1 Segolene Combettes 2 Cécile Garcia 3 Teresa Hungría 4 Béatrice Pécassou 1 Marie-José Casanove 2
2 CEMES-SINanO - Surfaces, Interfaces et Nano-Objets
CEMES - Centre d'élaboration de matériaux et d'études structurales
3 Trigone-CIREL
CIREL - Centre Interuniversitaire de Recherche en Education de Lille (CIREL) - EA 4354 : EA1038
Abstract : In contrast with bimetallics, multimetallic nanoparticle (NPs) can combine different chemical orders in the same NP, which favors an enhanced tuning of their properties. In this work, trimetallic (Fe, Rh, Au) nanocrystals with controlled composition and chemical distribution were grown through a physical vapor deposition route using a two-step process. First FeRh nanocrystals, 8.5 nm of mean diameter, were formed according to a Volmer−Weber growth mode. The growth conditions were tuned so as to achieve the atomic scale chemical order displayed by the intermetallic B2-FeRh phase. Then the gold layer was deposited at a lower temperature. Evidence is given for the complete coverage of the gold shell, which grows epitaxially over the B2-FeRh core exposed facets. These different features are particularly promising for further applications.
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https://hal.archives-ouvertes.fr/hal-02617536
Contributor : Marie-Jose Casanove <>
Submitted on : Monday, May 25, 2020 - 12:39:00 PM
Last modification on : Tuesday, May 26, 2020 - 3:38:16 AM

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Patrizio Benzo, Segolene Combettes, Cécile Garcia, Teresa Hungría, Béatrice Pécassou, et al.. Epitaxial Growth of a Gold Shell on Intermetallic FeRh Nanocrystals. Crystal Growth and Design, American Chemical Society, 2020, ⟨10.1021/acs.cgd.0c00414⟩. ⟨hal-02617536⟩

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