Surface Morphology Study of Chemical Vapor Transport of ZnO Crystals

Figure 4

(a) OM picture of the as-grown crystal with enlargement of 200 times

(b) SEM picture of the as-grown crystal with enlargement of 250 times

(c) SEM picture of the as-grown crystal with enlargement of 4000 times

(d) SEM picture of the as-grown crystal with enlargement of 30000 times