Smart Mesoporous Silica Nanocapsules as Environmentally Friendly Anticorrosive Pigments

Figure 4

SEM image (a), TEM image, (b) and EDX analysis (c) of the SiO₂ mesoporous nanoparticles loaded with sodium phosphomolybdate and encapsulated by a PDDA layer.

(a)

(b)

(c)