Other Metal Magnetic Nanoparticles Synthesized by Methods of Colloidal Chemistry

5 Other Metal Magnetic Nanopartides Synthesized by Methods of Colloidal Chemistry In the previous sections, the coUoidal synthesis of Co and CoPts nanocrystals and the great potential of an organometallic approach in the preparation of high-quality magnetic nanoparticles have been discussed. Yet, these synthetic 

The indexing is based on tabulated fct FePt reflections (25). Reproduced with permission from Ref [86] 2000, American Association for the Advancement of Science. 

The synthetic approach developed for the synthesis of platinum-iron binary alloy nanopartides was subsequently adopted for the preparation of several other binary alloy nanopartides, such as FePd [90] or MnPt [91]. However, these alloys required further structural characterization, as well as further developments of the methods for controlling the partide size, shape, and composition. 

The preparation of core-shell -type magnetic nanopartides was reported [92,93] as a two-step synthesis in which nanopartides of one metal served as the seeds for growth of the shell from another metal. Thus, the reduction of platinum salts in the presence of Co nanopartides would allow the preparation of air-stable CocorePtsheii nanopartides [92]. The thermal decomposition of cobalt carbonyl in the presence of silver salt led to the formation of AgcoreCOgheii nanopartides [93]. The syntheses of these multicomponent magnetic nanostructures are discussed in Section 3.3.2.4. 

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