Projection of the inverse spinel structure and the HAADF-STEM image of CoFe2O4 nanoparticles. (a) Projection of the inverse spinel structure of CoFe2O4 along the <110> zone axis. Red balls represent iron atoms; green balls represent cobalt atoms; oxygen atoms have been removed for clarity. (b) Atomic resolution HAADF-STEM image of CoFe2O4 nanoparticles. Bright balls correspond to cobalt and ferrite atoms. Superimposed points are Co and Fe positions calculated from the crystal model.
Liu et al. Nanoscale Research Letters 2013 8:374 doi:10.1186/1556-276X-8-374