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Synthesis of silver-gold alloy nanoparticles by a phase-transfer system

Abstract:

We have studied the preparation of silver-gold alloy nanoparticles based on the phase transfer of metal precursors from aqueous phase to organic solution by a fatty amine at room temperature. Silver-gold nanoparticles were synthesized with different molar ratios (2:1, 1:1, 1:2). Ultraviolet-visible absorption spectra suggested the formation of alloy phases. The elemental Ag:Au ratios in the bimetallic nanoparticles determined by energy dispersive x-ray analysis (EDX) were consistent with the Ag:Au molar ratios used in the feeding solution. Transmission electron microscopy (TEM) revealed the formation of a uniform size distribution of Ag:Au nanoparticles (around 5 nm). X-ray photoelectron spectroscopy (XPS) showed that the composition in the outer part of the Ag:Au nanoparticles was similar to that obtained by EDX analysis, which indicates the formation of homogeneous silver-gold nanoparticles. Silver-gold alloy nanoparticles on a gram scale can be obtained with this method. © 2006 Materials Research Society.

Año de publicación:

2006

Keywords:

    Fuente:

    scopusscopus

    Tipo de documento:

    Article

    Estado:

    Acceso restringido

    Áreas de conocimiento:

    • Nanopartícula
    • Nanopartícula
    • Ciencia de materiales

    Áreas temáticas:

      Contribuidores:

      Fierro J.L.G.Fierro J.L.G.
      Iuliana CotaIuliana Cota
      Ricardo José ChimentãoRicardo José Chimentão
      Dafinov A.I.Dafinov A.I.
      Cesteros Y.Cesteros Y.
      Medina F.Medina F.
      Sueiras J.E.Sueiras J.E.
      Salagre P.Salagre P.
      Gómez de la Fuente J.L.Gómez de la Fuente J.L.