Fig. 4

Zeta potential analysis. Zeta potential (mean): − 30.9 mV. Zeta potential (mean): − 32.9 mV. Zeta potential (mean): − 34.9 mV
Zeta potential analysis. Zeta potential (mean): − 30.9 mV. Zeta potential (mean): − 32.9 mV. Zeta potential (mean): − 34.9 mV