Figure 4: Representative SEM and TEM images of PAC-900.

(a) Low-magnification SEM image of PAC-900. (b) High-magnification SEM image of PAC-900. (c) Low-magnification TEM image of PAC-900. (d) HRTEM image of PAC-900.
(a) Low-magnification SEM image of PAC-900. (b) High-magnification SEM image of PAC-900. (c) Low-magnification TEM image of PAC-900. (d) HRTEM image of PAC-900.