Table 1.

Particle size, polydispersity index (PDI), and zeta potentials of PG4.5, PG4.5-DETA, PG4.5-DETA-biotin, and PG4.5-DETA-biotin/GEM.

Formulation	Size (nm)	PDI	Zeta (mV)
PG4.5 PG4.5-DETA	3.58 ± 0.49 49.61 ± 1.95 *	0.428 0.419	−28.30 ± 3.96 −2.31 ± 1.27 *
PG4.5-DETA-biotin	82.24 ± 8.49 **	0.041	−2.03 ± 0.12 *
PG4.5-DETA-biotin/GEM	81.60 ± 6.08 **	0.322	0.47 ± 1.25 *

* P < 0.05 and ** P < 0.01 compared to PG4.5.