Table 1.

Size, PDI and zeta potential of different nanoparticles (mean ± SD)

Preparations	Size (nm)	PDI	Zeta (mV)
PPP-RH-NPs	75.4 ± 2.9	0.11 ± 0.05	6.4 ± 2.5
PP-RH-NPs	70.3 ± 5.5	0.15 ± 0.07	−16.6 ± 4.3
PPP-NPs	86.2 ± 6.7	0.20 ± 0.12	32.7 ± 4.8
PP-NPs	66.7 ± 4.8	0.09 ± 0.04	−12.7 ± 3.5

Notes: PP-RH-NPs, RH-loaded PEG-PCL nanoparticles; PP-NPs, PEG-PCL nanoparticles without loading RH; PPP-NPs, PEG-PCL-PEI nanoparticles without loading RH; PPP-RH-NPs, RH-loaded PEG-PCL-PEI nanoparticles.

Abbreviations: PDI, polydispersity index; PEG-PCL, polyethyleneglycol-co-polycaprolactone; PEG-PCL-PEI, polyethyleneglycol-co-polycaprolactone-co-poly-ethylenimine; RH, rhein.