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Issue 21, 2018
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Twin-mediated epitaxial growth of highly lattice-mismatched Cu/Ag core–shell nanowires

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Abstract

Lattice-mismatch is an important factor for the heteroepitaxial growth of core–shell nanostructures. A large lattice-mismatch usually leads to a non-coherent interface or a polycrystalline shell layer. In this study, a conformal Ag layer is coated on Cu nanowires with dense nanoscale twin boundaries through a galvanic replacement reaction. Despite a large lattice mismatch between Ag and Cu (∼12.6%), the Ag shell replicates the twinning structure in Cu nanowires and grows epitaxially on the nanotwinned Cu nanowire. A twin-mediated growth mechanism is proposed to explain the epitaxy of high lattice-mismatch bimetallic systems in which the misfit dislocations are accommodated by coherent twin boundaries.

Graphical abstract: Twin-mediated epitaxial growth of highly lattice-mismatched Cu/Ag core–shell nanowires

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Publication details

The article was received on 10 Apr 2018, accepted on 08 May 2018 and first published on 09 May 2018


Article type: Communication
DOI: 10.1039/C8NR02875C
Citation: Nanoscale, 2018,10, 9862-9866
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    Twin-mediated epitaxial growth of highly lattice-mismatched Cu/Ag core–shell nanowires

    W. Weng, C. Hsu, J. Lee, H. Fan and C. Liao, Nanoscale, 2018, 10, 9862
    DOI: 10.1039/C8NR02875C

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