Fabrication and characterization of eutectic gold-silicon (Au-Si) nanowires

Jin Shyong Lin, Chien Chon Chen, Wei-Guang Diau*, Tzeng Feng Liu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Hypoeutectic, eutectic and hypereutectic gold-silicon (Au-Si) alloys were synthesized using vacuum smelting. When Au and Si were smelted in a vacuum chamber near 1100 °C, Si(g), Si2(g), Si3(g), SiO2(g), Au(g), SiO2(s) and Au2O3(s) were formed rapidly; the quantities of Au and Si lost were estimated from thermodynamic formulas. The nano- and microstructures of the Au-Si eutectic compound were characterized with a SEM and a TEM, which showed a discontinuous phase of Si dispersed and mounted within a matrix phase of Au. Cracks that formed about the Au-Si interface made the Au-Si eutectic brittle. From an Au-Si alloy of superior quality as a bulk material, eutectic nanowires of average diameter 60 nm were fabricated after the alloy was melted and injected into an anodic aluminum-oxide (AAO) template.

Original languageEnglish
Pages (from-to)425-430
Number of pages6
JournalJournal of Materials Processing Technology
Volume206
Issue number1-3
DOIs
StatePublished - 12 Sep 2008

Keywords

  • AAO
  • Au-Si alloy
  • Die-casting
  • Eutectic nanowire
  • Vacuum smelting

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