Figure 2
From: Double-walled iron oxide nanotubes via selective chemical etching and Kirkendall process
(a) High angle annular dark field (HAADF) STEM side-view image of a single double walled nanotube; (b) STEM-EELS chemical profile across α-Fe2O3 double wall NT along the green line in (a); (c) HAADF-STEM side-view of another double walled nanotube with composition on inset.
