736375.fig.003a
(a)
736375.fig.003b
(b)
736375.fig.003c
(c)
Figure 3: (a) SEM image of disperse MnO octahedral NCs, (b) SEM image of well-oriented MnO SCs, and (c) TEM image of hexagonal wurtzite MnO on the carbon sphere template [55, 61].