Solution chemistry synthesis, morphology studies, and optical properties of five distinct nanocrystalline Au-Zn intermetallic compounds

Zachary L. Schaefer, Dimitri D. Vaughn, Raymond E. Schaak

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Au-Zn was used as a prototype binary system for exploring intermetallic phase accessibility in nanoparticle systems using low-temperature solution chemistry methods. By reacting Au nanoparticles with diethylzinc (Et2Zn) in oleylamine at temperatures of 250-300 °C, nanoparticles of five distinct binary intermetallic compounds were accessible: Au3Zn, Au5Zn3, AuZn, Cu5Zn8-type γ-(Au,Zn), and Mg-type ε-(Au,Zn). A variety of nanoparticle shapes, including spheres, triangles, hexagons, and rods, are accessible in the Au-Zn system via a pseudomorphic reaction of Au nanocrystal shapes with Et2Zn. The Au-Zn nanoparticles have optical properties that vary with Zn content, ranging from a surface plasmon resonance peak at ∼495 nm for Au3Zn to absorption in the ultraviolet region for the Zn-rich phases.

Original languageEnglish (US)
Pages (from-to)98-102
Number of pages5
JournalJournal of Alloys and Compounds
Volume490
Issue number1-2
DOIs
StatePublished - Feb 4 2010

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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