Fig. 1. STEM images of as-prepared (a) bare and (b) 70 wt% SiO2-coated Zn0.4Fe2.6O4 nanoparticles. Insets schematically depict characteristic morphology. Table (below) summarizes morphological characteristics of the different prepared particles: crystal sizes (dXRD), geometric mean primary particle sizes of core (dTEM,core), geometrical standard deviations of primary particle sizes of core (σg), geometric means of hydrodynamic diameter (dDLS), ζ-potentials (ζ-pot).
