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Enhanced Solubility of Cu in Ag Nanoparticles Synthesized by Inert Gas Condensation

Published online by Cambridge University Press:  01 February 2011

Abdullah Ceylan ,
C. Ni  and
S. Ismat Shah
Abdullah Ceylan
Affiliation:
Department of Physics and Astronomy, University Delaware, 305A Sharp Lab, Newark, DE 19716, USA Physics Engineering Department, Hacettepe University, Beytepe, Ankara 06800, TURKEY
C. Ni
Affiliation:
Department of Materials Science and Engineering, University of Delaware, Newark, DE 19716, USA
S. Ismat Shah
Affiliation:
Department of Physics and Astronomy, University Delaware, 305A Sharp Lab, Newark, DE 19716, USA Department of Materials Science and Engineering, University of Delaware, Newark, DE 19716, USA
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Abstract

Ag-Cu alloy nanoparticles were prepared by rapid condensation of metal flux obtained by the simultaneous evaporation of high purity Cu and Ag wires on a tungsten boat in the presence of circulating He gas. Structural properties of the samples prepared at different conditions were investigated by using X-ray diffraction (XRD), transmission electron microscopy (TEM) and selected area diffraction (SAD) patterns. X-ray diffraction patterns showed that particles were phase separated. The particle size obtained either from Scherer's formula or the TEM images show no systematic change on the size of either Cu or Ag particles in the evaporation temperature range between 800 and 1400 °C. By using lattice constant values and Vegard's law, the composition of the particles was calculated to be 6.6 vol% Cu in Ag. Electron diffraction images revealed that particles were softly agglomerated; these electron diffraction results were also consistent with XRD results regarding phase separation. Individual diffraction rings of the Cu and Ag were observed in the SAD patterns.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 854: Symposium U – Stability of Thin Films and Nanostructures , 2004 , U5.5
Copyright
Copyright © Materials Research Society 2005

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References

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