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

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

Composite nanoparticles composed of noble metal (Au, Pt or Pd) and iron-oxide (Fe3O4 or *g-Fe2O3) were successfully prepared by y-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 m...

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Veröffentlicht in:Scripta materialia 2004-09, Vol.51 (6), p.467-472
Hauptverfasser: Seino, S, Kinoshita, T, Otome, Y, Maki, T, Nakagawa, T, Okitsu, K, Mizukoshi, Y, Nakayama, T, Sekino, T, Niihara, K, Yamamoto, T A
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Sprache:eng
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Zusammenfassung:Composite nanoparticles composed of noble metal (Au, Pt or Pd) and iron-oxide (Fe3O4 or *g-Fe2O3) were successfully prepared by y-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/*g-Fe2O3 and Au/Fe3O4 composite nanoparticles exhibited surface plasmon of Au nanoparticles.
ISSN:1359-6462
DOI:10.1016/j.scriptamat.2004.06.003