Table 5.

Zeta potential and hydrodynamic size of MCM-41, MCM-41/AP, and MCM-41/AP-AFF.

Sample	Zeta Potential	Hydrodynamic	Polydispersion Index (PDI)
MCM-41	−23.2 meV	130 nm	0.4
MCM-41/AP	+39 meV	242 nm	0.2
MCM-41/AP-AFF	+36 meV	210 nm	0.2