Protective agent-free synthesis of Ni-Ag core-shell nanoparticles

Dong Hwang Chen, Shiuann Ren Wang

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)

Abstract

Ni-Ag core-shell nanoparticles have been prepared by successive hydrazine reduction in ethylene glycol in the absence of protective agents. TEM analysis indicated the product was very fine and the thickness of Ag nanoshells could be controlled by the added silver nitrate concentration. The analyses of electron diffraction pattern and XRD revealed that both Ni cores and Ag shells had a fcc structure. The surface composition analysis by XPS indicated that Ni cores were fully covered by Ag nanoshells. Because of the absence of protective agent, the appropriate nickel concentration for the coating of Ag nanoshells should be less than 1.0 mM to avoid particle agglomeration. The product possessed the surface character of Ag and the magnetic property of Ni, and may have many potential applications in optical, magnetic, catalytic, biochemical, and biomedical fields.

Original languageEnglish
Pages (from-to)468-471
Number of pages4
JournalMaterials Chemistry and Physics
Volume100
Issue number2-3
DOIs
Publication statusPublished - 2006 Dec 10

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

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