Twin-mediated epitaxial growth of highly lattice-mismatched Cu/Ag coreshell nanowiresElectronic supplementary information (ESI) available. See DOI: 10.1039/c8nr02875c

Twin-mediated epitaxial growth of highly lattice-mismatched Cu/Ag coreshell nanowiresElectronic... Lattice-mismatch is an important factor for the heteroepitaxial growth of coreshell 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. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nanoscale Royal Society of Chemistry

Twin-mediated epitaxial growth of highly lattice-mismatched Cu/Ag coreshell nanowiresElectronic supplementary information (ESI) available. See DOI: 10.1039/c8nr02875c

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Publisher
The Royal Society of Chemistry
Copyright
This journal is © The Royal Society of Chemistry
ISSN
2040-3364
D.O.I.
10.1039/c8nr02875c
Publisher site
See Article on Publisher Site

Abstract

Lattice-mismatch is an important factor for the heteroepitaxial growth of coreshell 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.

Journal

NanoscaleRoyal Society of Chemistry

Published: May 23, 2018

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