Compositional inhomogeneity of Pd70Ag30 alloy nanoparticles

Kuan Wen Wang, Shu Ru Chung, Ling Yun Jang, Jyh Fu Lee, Tsong P. Perng

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Taiwan The compositional inhomogeneity of Pd70Ag30 nanoparticles is studied. The composition of the as-prepared Pd 70Ag30 nanoparticles by chemical reduction across the diameter is inhomogeneous due to different reduction potentials of Pd and Ag. During the heat treatment, Ag will migrate to the surface because of its lower surface energy. Surface modification can change the surface energy and composition during the oxidation and sintering processes. Surface modification of Pd70Ag30 nanoparticles by polyethylene glycol will decrease the surface energy of Ag and assist the diffusion of Ag from the core to the surface. This makes the nanoparticles easier to sinter together. Surface modification by stearic acid has the opposite effect and results in less sintering of the nanoparticles.

Original languageEnglish
Title of host publication2003 Nanotechnology Conference and Trade Show - Nanotech 2003
EditorsM. Laudon, B. Romanowicz
Number of pages4
StatePublished - 2003
Event2003 Nanotechnology Conference and Trade Show - Nanotech 2003 - San Francisco, CA, United States
Duration: 23 Feb 200327 Feb 2003

Publication series

Name2003 Nanotechnology Conference and Trade Show - Nanotech 2003


Conference2003 Nanotechnology Conference and Trade Show - Nanotech 2003
Country/TerritoryUnited States
CitySan Francisco, CA


  • Nanoparticle
  • Pdag
  • Polyethylene glycol
  • Stearic acid
  • Surface modification


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