Figure 2

Morphology and structure of MPG.
(a) SEM images of MPG; (b) HRSEM images of MPG; (c) and (d) TEM images of MPG; insert of (d) is HRTEM image.

Morphology and structure of MPG.
(a) SEM images of MPG; (b) HRSEM images of MPG; (c) and (d) TEM images of MPG; insert of (d) is HRTEM image.