Table 1.

Characterization of SPIO-PEG and SPIO-PEG-D (n=3)

Formulation	Hydrodynamic diameter (nm)	Polydispersity index	Zeta potential value (mV)
SPIO-PEG	70±2.3	0.213±0.03	−14.2±0.4
SPIO-PEG-D	85±3.1	0.242±0.05	−1.8±0.2

Abbreviations: SPIO-PEG, superparamagnetic iron oxide with polyethylene glycol; SPIO-PEG-D, SPIO with PEG conjugated with doxorubicin.