Synthesis of “Solid Solution” and “Core-Shell” Type Cobalt−Platinum Magnetic Nanoparticles via Transmetalation Reactions

摘要: In this article, we report the synthesis of “solid solution” and “core-shell” types well-defined Co−Pt nanoalloys smaller than 10 nm. The formation these alloys is driven by redox transmetalation reactions between reagents without need for any additional reductants. Also reaction proceeds selectively as long potential two metals favorable. Co2(CO)8 Pt(hfac)2 (hfac = hexafluoroacetylacetonate) results in type such CoPt3 nanoparticles. On other hand, Co nanoparticles with solution “CocorePtshell” nanoalloys. Nanoparticles synthesized both are moderately monodispersed (σ < 10%) further size selection processes. composition can also be tuned adjusting ratio reactants. magnetic structural properties obtained byproducts characterized TEM, SQUID, UV/v...