843570.fig.002a
(a)
843570.fig.002b
(b)
843570.fig.002c
(c)
843570.fig.002d
(d)
Figure 2: TEM results of the as-produced nanospheres: (a) low-magnification TEM image; (b) high-magnification TEM image; (c) EDX spectrum of the sphere as-illustrated in Figure 2(a); and (d) HRTEM image of a nanosphere and its corresponding selected-area electron diffraction pattern.