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Thermodynamically driven oxidation-induced Kirkendall effect in octahedron-shaped cobalt oxide nanocrystals

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Abstract

The morphology and atomic arrangement of transition metal oxide nanoparticles play a role in their envisioned technological and industrial applications, as being key to their expected performance. In particular, the magnetic or catalytic properties of cobalt oxide nanocrystals rely on their surface energy, which strongly influences their phase stability. Herein, we report the growth mechanism of cobalt oxide nanocrystals displaying an octahedral shape with a main cavity or cracks inside, stemming from the arrangement of initial nuclei, the oxidation at the surface and a consequent Kirkendall effect, driving the final disposition of two crystalline structures in the nanocrystals.

Graphical abstract: Thermodynamically driven oxidation-induced Kirkendall effect in octahedron-shaped cobalt oxide nanocrystals

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Publication details

The article was received on 14 Jul 2017, accepted on 22 Aug 2017 and first published on 22 Aug 2017


Article type: Paper
DOI: 10.1039/C7CE01285C
Citation: CrystEngComm, 2017, Advance Article
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    Thermodynamically driven oxidation-induced Kirkendall effect in octahedron-shaped cobalt oxide nanocrystals

    M. A. Ramos-Docampo, B. Rivas-Murias, B. Rodríguez-González and V. Salgueiriño, CrystEngComm, 2017, Advance Article , DOI: 10.1039/C7CE01285C

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