γ-ray synthesis of composite nanoparticles of noble metals and magnetic iron oxides

S. Seino, T. Kinoshita, Y. Otome, T. Maki, T. Nakagawa, K. Okitsu, Y. Mizukoshi, T. Nakayama, T. Sekino, K. Niihara, T. A. Yamamoto

Research output: Contribution to journalArticlepeer-review

52 Citations (Scopus)

Abstract

Composite nanoparticles composed of noble metal (Au, Pt or Pd) and iron-oxide (Fe3O4 or γ-Fe2O3) were successfully prepared by γ-ray irradiation of a suspension of iron oxide in an aqueous solution containing noble metal. Formation of the composite nanoparticles was confirmed by the techniques of magnetic separation and XRD. TEM observation revealed that the noble metal nanoparticles were immobilized on the surface of magnetic iron-oxide nanoparticles. Aqueous dispersion of Au/γ-Fe2C3 and Au/Fc3O4 composite nanoparticles exhibited surface plasmon of Au nanoparticles.

Original languageEnglish
Pages (from-to)467-472
Number of pages6
JournalScripta Materialia
Volume51
Issue number6
DOIs
Publication statusPublished - 2004 Sep
Externally publishedYes

Keywords

  • Composite nanoparticle
  • Magnetic iron oxide
  • Magnetic separation
  • Noble metal
  • γ-ray

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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