Bulk Nanostructured Metal from Multiply-Twinned Nanowires

Luke C.O. Prestowitz, Sahin Coskun, Xiaobing Hu, David C. Dunand*, Jiaxing Huang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Using chemically synthesized silver nanowires with 5-fold twinning planes as a model system, a bottom-up process to generate a bulk nanostructured metal has been demonstrated. Although the nanowires would be shortened and deformed during densification, they are chosen as a model system because they are currently the most scalable and convenient way to obtain Ag particles with high twinning densities. Direct cold pressing of a silver nanowire filter cake did not generate a sufficiently cohesive sample, while hot pressing at 190 °C for 8 h resulted in extensive sintering, eliminating the nanowire morphology. Copper was then electroplated on the silver nanowires as a binder and filler to increase the densification upon hot pressing; despite nonuniform plating across the thickness of the filter cake, the thermal stability of the nanowires was increased, allowing hot pressing at 390 °C. Finally, a uniform copper coating on silver nanowires was achieved by electroless plating, leading to cohesive bulk metal after hot pressing.

Original languageEnglish (US)
Pages (from-to)5627-5632
Number of pages6
JournalNano letters
Volume21
Issue number13
DOIs
StatePublished - Jul 14 2021

Keywords

  • bulk nanostructured metals
  • electroless plating
  • hardness
  • nanotwinning
  • silver nanowires

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering
  • Bioengineering
  • General Chemistry
  • General Materials Science

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