Table 2.

Hydrodynamic particle size, polydispersity index (PDI), and ζ-potential of the drug-free and drug-loaded MSN–PEI suspensions (c = 0.2 mg/mL) in MQ/PG. The data is presented in triplicate ± StD.

Sample	Particle Size (nm)	PDI	Zeta Potential (mV)
MSN–PEI	395.4 ± 1.6	0.050 ± 0.026	57.0 ± 0.6
MSN–PEI–F5	289.0 ± 13.5	0.802 ± 1.07	46.6 ± 0.6
MSN–PEI–F15	445.9 ± 117.1	1.00	38.5 ± 2.8