Figure 3
From: Porous Iron Oxide Ribbons Grown on Graphene for High-Performance Lithium Storage

Elemental mapping images of iron oxide ribbons.
(a) Typical scanning transmission electron microscopy (STEM) image and corresponding elemental mapping images of (b) iron and (c) oxygen in the selected area (white rectangle in (a)), indicating the homogeneous dispersion of iron and oxygen in the FeO ribbons.