Fig. 10
From: Ion exchange: an advanced synthetic method for complex nanoparticles
(Reprinted with permission from American Chemical Society [93])
a A schematic of the cation exchange reaction in Cu2−xSe NPs involving Sn4+ and Sn3+ ions. Transmission electron microscopy images of pristine Cu2−xSe (b), Cu0.66Sn0.33Se (c), and SnSe (d) NPs