Ultrahigh Tensile Strength Nanowires with a Ni/Ni-Au Multilayer Nanocrystalline Structure

Boo Hyun An, In Tak Jeon, Jong Hyun Seo, Jae Pyoung Ahn, Oliver Kraft, In Suk Choi, Young Keun Kim

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


Superior mechanical properties of nanolayered structures have attracted great interest recently. However, previously fabricated multilayer metallic nanostructures have high strength under compressive load but never reached such high strength under tensile loads. Here, we report that our microalloying-based electrodeposition method creates a strong and stable Ni/Ni-Au multilayer nanocrystalline structure by incorporating Au atoms that makes nickel nanowires (NWs) strongest ever under tensile loads even with diameters exceeding 200 nm. When the layer thickness is reduced to 10 nm, the tensile strength reaches the unprecedentedly high 7.4 GPa, approximately 10 times that of metal NWs with similar diameters, and exceeding that of most metal nanostructures previously reported at any scale.

Original languageEnglish
Pages (from-to)3500-3506
Number of pages7
JournalNano Letters
Issue number6
Publication statusPublished - 2016 Jun 8


  • Ultrastrong nanowire
  • microalloying
  • multilayer structure
  • nanocrystalline Ni-Au

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering


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