A library of single-crystal metal - tin nanorods: Using diffusion as a tool for controlling the morphology of intermetallic nanocrystals

Raymond Edward Schaak, Nam Hawn Chou

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36 Scopus citations

Abstract

We describe a unified and general template-based strategy for synthesizing a library of morphology-controllable M-Sn (M = Co, Ni, Cu, Ag, Au, Pt, Ru) intermetallic nanorods. The reaction of β-Sn nanorod templates with appropriate metal salt solutions under reducing conditions yields single-crystal intermetallic nanorods of CoSn3, Ni3Sn4, Cu6Sn5, Ag4Sn, AuSn, PtSn, and RuSn 2. Temperature plays a key role in maintaining the morphology of the β-Sn nanorod templates in the final M-Sn products and also selectively generating spherical nanocrystals vs dense nanorods vs hollow nanorods, in some cases (e.g., CoSn3) within the same system. These observations are linked to the diffusion process, and accordingly, the melting points of the transition elements used in this study can help us understand and predict the morphologies that can be formed, as well as the lowest temperature at which a particular intermetallic compound can form using low-temperature solution routes.

Original languageEnglish (US)
Pages (from-to)2081-2085
Number of pages5
JournalChemistry of Materials
Volume20
Issue number6
DOIs
StatePublished - Mar 25 2008

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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