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Figure 1: SEM images of dry powder of cZnO (a) and ZnO NP (mean of particle size < 70 nm) (b) and different concentrations of ZnO NP c = 5 mg/5 cc, d = 10 mg/5 cc, e = 20 mg/5 cc (mean of particle size > 133 nm).

Figure 1: SEM images of dry powder of cZnO (a) and ZnO NP (mean of particle size < 70 nm) (b) and different concentrations of ZnO NP c = 5 mg/5 cc, d = 10 mg/5 cc, e = 20 mg/5 cc (mean of particle size > 133 nm).