The core shell Rh@Fe NPs was successfully synthesized by a one pot method, using the different kinetics of hydrogenation of organometallic precursors. Rh(allyl)39 and Fe[N(SiMe3)2] 210 was selected as metal precursors. These particles displayed enhanced magnetic moments in quantitative agreement with measurements on bare-gas particles that demonstrated that the production of hexamethyldisilazane in the hydrogenation step is the most sensitive physical parameters of the material. Repeated energy-dispersive X-ray (EDX) analysis showed the presence of isolated NPs containing both materials. The structures were investigated by wide-angle X-ray scattering (WAXS) measurements. The magnetic properties of final Rh20Fe80 NPs was carried out by SQUID and the zero field cooled magnetization curve measured at 1 mT is characteristic of a superparamagnetic behavior that displayed a very low blocking temperature.
|Original language||English (US)|
|Number of pages||3|
|Journal||Chemistry of Materials|
|State||Published - Sep 18 2007|
ASJC Scopus subject areas
- Chemical Engineering(all)
- Materials Chemistry