Fig. 1From: Polymer coated gold-ferric oxide superparamagnetic nanoparticles for theranostic applicationsTEM images showing Au–Fe3O4 NPs a without, and b, c with PLL coating. Scale bar = 50 nm in a, b, and 20 nm in c. The dark black circles indicate Au and the shaded hexagons represent Fe3O4. Arrows in c indicate a thin layer of PLL coatingBack to article page