Low-temperature solution synthesis of the non-equilibrium ordered intermetallic compounds Au3Fe, Au3Co, and Au3Ni as nanocrystals

Yolanda Vasquez, Zhiping Luo, Raymond Edward Schaak

Research output: Contribution to journalArticle

72 Citations (Scopus)

Abstract

Alloys and intermetallic compounds of Au with the 3d transition metals Fe, Co, and Ni are nonequilibrium phases that have many useful potential applications as catalytic, magnetic, optic, and multifunctional magneto-optic materials. However, the atomically ordered Au-M (M = Fe, Co, Ni) intermetallics are particularly elusive from a synthetic standpoint. Here we report the low-temperature solution synthesis of the L12 (Cu3Au-type) intermetallic compounds Au3Fe, Au3Co, and Au3Ni using n-butyllithium as a reducing agent. Reaction pathway studies for the Au3Co system indicate that Au nucleates first, followed by Co incorporation to form the intermetallic. The nonequilibrium intermetallic nanocrystals have been characterized by powder XRD, TEM, EDS, selected area electron diffraction, and nanobeam electron diffraction, which collectively confirm the compositions and superlattice structures.

Original languageEnglish (US)
Pages (from-to)11866-11867
Number of pages2
JournalJournal of the American Chemical Society
Volume130
Issue number36
DOIs
StatePublished - Sep 10 2008

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Nanoparticles
Nanocrystals
Intermetallics
L 012
Electrons
Temperature
Reducing Agents
Powders
Electron diffraction
Metals
Magnetooptical effects
Reducing agents
Transition metals
Energy dispersive spectroscopy
Optics
Transmission electron microscopy
Chemical analysis
n-butyllithium

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

Cite this

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Low-temperature solution synthesis of the non-equilibrium ordered intermetallic compounds Au3Fe, Au3Co, and Au3Ni as nanocrystals. / Vasquez, Yolanda; Luo, Zhiping; Schaak, Raymond Edward.

In: Journal of the American Chemical Society, Vol. 130, No. 36, 10.09.2008, p. 11866-11867.

Research output: Contribution to journalArticle

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AB - Alloys and intermetallic compounds of Au with the 3d transition metals Fe, Co, and Ni are nonequilibrium phases that have many useful potential applications as catalytic, magnetic, optic, and multifunctional magneto-optic materials. However, the atomically ordered Au-M (M = Fe, Co, Ni) intermetallics are particularly elusive from a synthetic standpoint. Here we report the low-temperature solution synthesis of the L12 (Cu3Au-type) intermetallic compounds Au3Fe, Au3Co, and Au3Ni using n-butyllithium as a reducing agent. Reaction pathway studies for the Au3Co system indicate that Au nucleates first, followed by Co incorporation to form the intermetallic. The nonequilibrium intermetallic nanocrystals have been characterized by powder XRD, TEM, EDS, selected area electron diffraction, and nanobeam electron diffraction, which collectively confirm the compositions and superlattice structures.

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