indicate that the G6-C12(Fe55) DENs are superparamagnetic, are a consequence of the small particle size.35 Fig. 4b shows the M–H loop for the G6-C12(Fe147) DENs. These data were obtained at 5 K (recall Tb = 6 K), and therefore ferromagnetic behavior is observed with an estimated Ms value of 70.0 emu gFe1 and a coercivity (Hc) of 202 Oe. Note that the Ms value for the G6-C12(Fe147) DENs is considerably larger than for the G6-C12(Fe55) DENs (B14.0 emu gFe1), but that it does not approach the bulk value of 220 emu gFe1.36