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Issue 24, 2014
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Ru-core/Cu-shell bimetallic nanoparticles with controlled size formed in one-pot synthesis

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Abstract

Suspensions of bimetallic nanoparticles (NPs) of Ru and Cu have been synthesized by simultaneous decomposition of two organometallic compounds in an ionic liquid. These suspensions have been characterized by Anomalous Small-Angle X-ray Scattering (ASAXS) at energies slightly below the Ru K-edge. It is found that the NPs adopt a Ru-core, a Cu-shell structure, with a constant Ru core diameter of 1.9 nm for all Ru : Cu compositions, while the Cu shell thickness increases with Cu content up to 0.9 nm. The formation of RuCuNPs thus proceeds through rapid decomposition of the Ru precursor into RuNPs of constant size followed by the reaction of the Cu precursor and agglomeration as a Cu shell. Thus, the different decomposition kinetics of precursors make possible the elaboration of core–shell NPs composed of two metals without chemical affinity.

Graphical abstract: Ru-core/Cu-shell bimetallic nanoparticles with controlled size formed in one-pot synthesis

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Publication details

The article was received on 01 Jul 2014, accepted on 01 Oct 2014 and first published on 06 Oct 2014


Article type: Paper
DOI: 10.1039/C4NR03666B
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Nanoscale, 2014,6, 14856-14862

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    Ru-core/Cu-shell bimetallic nanoparticles with controlled size formed in one-pot synthesis

    I. Helgadottir, G. Freychet, P. Arquillière, M. Maret, P. Gergaud, P. H. Haumesser and C. C. Santini, Nanoscale, 2014, 6, 14856
    DOI: 10.1039/C4NR03666B

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